http://www.nist.gov/pml/data/comp.cfm Isotope: Atomic number, Symbol, and Mass number NB: I had to add a '0.0()' in the third column of the first line for elements beyond He, as well as a () after the fractions that were 1.0000, in order to conform to my reading statement. BPz 12/06-2012 Isotope Atomic Mass Composition Atomic Weight Notes _________________________________________________________________________ 1 H 1 1.00782503207(10) 0.999885(70) 1.00794(7) g,m,r,b,w D 2 2.0141017778(4) 0.000115(70) T 3 3.0160492777(25) H 4 4.02781(11) 5 5.03531(11) 6 6.04494(28) 7 7.05275(108)# _________________________________________________________________________ 2 He 3 3.0160293191(26) 0.00000134(3) 4.002602(2) g,r,a 4 4.00260325415(6) 0.99999866(3) 5 5.012220(50) 6 6.0188891(8) 7 7.028021(18) 8 8.033922(7) 9 9.043950(30) 10 10.052400(80) _________________________________________________________________________ 3 Li 3 3.03078(215)# 0.0() 6.941(2) g,m,r,c,i 4 4.02719(23) 5 5.012540(50) 6 6.015122795(16) 0.0759(4) 7 7.01600455(8) 0.9241(4) 8 8.02248736(10) 9 9.0267895(21) 10 10.035481(16) 11 11.043798(21) 12 12.05378(107)# _________________________________________________________________________ 4 Be 5 5.04079(429)# 0.0() 9.012182(3) 6 6.019726(6) 7 7.01692983(11) 8 8.00530510(4) 9 9.0121822(4) 1.0000() 10 10.0135338(4) 11 11.021658(7) 12 12.026921(16) 13 13.035690(80) 14 14.04289(14) 15 15.05346(54)# 16 16.06192(54)# _________________________________________________________________________ 5 B 6 6.04681(75)# 0.0() 10.811(7) g,m,r 7 7.029920(80) 8 8.0246072(11) 9 9.0133288(11) 10 10.0129370(4) 0.199(7) 11 11.0093054(4) 0.801(7) 12 12.0143521(15) 13 13.0177802(12) 14 14.025404(23) 15 15.031103(24) 16 16.039810(60) 17 17.04699(18) 18 18.05617(86)# 19 19.06373(43)# _________________________________________________________________________ 6 C 8 8.037675(25) 0.0() 12.0107(8) g,r 9 9.0310367(23) 10 10.0168532(4) 11 11.0114336(10) 12 12.0000000(0) 0.9893(8) 13 13.0033548378(10) 0.0107(8) 14 14.003241989(4) 15 15.0105993(9) 16 16.014701(4) 17 17.022586(19) 18 18.026760(30) 19 19.03481(11) 20 20.04032(26) 21 21.04934(54)# 22 22.05720(97)# _________________________________________________________________________ 7 N 10 10.04165(43) 0.0() 14.0067(2) g,r,a,d 11 11.026090(50) 12 12.0186132(11) 13 13.00573861(29) 14 14.0030740048(6) 0.99636(20) 15 15.0001088982(7) 0.00364(20) 16 16.0061017(28) 17 17.008450(16) 18 18.014079(20) 19 19.017029(18) 20 20.023370(60) 21 21.02711(10) 22 22.03439(21) 23 23.04122(32)# 24 24.05104(43)# 25 25.06066(54)# _________________________________________________________________________ 8 O 12 12.034405(20) 0.0() 15.9994(3) g,r,e,w 13 13.024812(10) 14 14.00859625(12) 15 15.0030656(5) 16 15.99491461956(16) 0.99757(16) 17 16.99913170(12) 0.00038(1) 18 17.9991610(7) 0.00205(14) 19 19.003580(3) 20 20.0040767(12) 21 21.008656(13) 22 22.009970(60) 23 23.01569(13) 24 24.02047(25) 25 25.02946(28)# 26 26.03834(28)# 27 27.04826(54)# 28 28.05781(64)# _________________________________________________________________________ 9 F 14 14.03506(43)# 0.0() 18.9984032(5) 15 15.01801(14) 16 16.011466(9) 17 17.00209524(27) 18 18.0009380(6) 19 18.99840322(7) 1.0000() 20 19.99998132(8) 21 20.9999490(19) 22 22.002999(13) 23 23.003570(90) 24 24.008120(80) 25 25.01210(11) 26 26.01962(18) 27 27.02676(40) 28 28.03567(55)# 29 29.04326(62)# 30 30.05250(64)# 31 31.06043(64)# _________________________________________________________________________ 10 Ne 16 16.025761(22) 0.0() 20.1797(6) g,m,a 17 17.017672(29) 18 18.0057082(3) 19 19.0018802(3) 20 19.9924401754(19) 0.9048(3) 21 20.99384668(4) 0.0027(1) 22 21.991385114(19) 0.0925(3) 23 22.99446690(11) 24 23.9936108(4) 25 24.997737(28) 26 26.000461(29) 27 27.00759(12) 28 28.01207(16) 29 29.01939(29) 30 30.02480(61) 31 31.03311(97)# 32 32.04002(86)# 33 33.04938(86)# 34 34.05703(87)# _________________________________________________________________________ 11 Na 18 18.025970(50) 0.0() 22.98976928(2) 19 19.013877(13) 20 20.007351(7) 21 20.9976552(8) 22 21.9944364(4) 23 22.9897692809(29) 1.0000() 24 23.99096278(8) 25 24.9899540(13) 26 25.992633(6) 27 26.994077(4) 28 27.998938(14) 29 29.002861(14) 30 30.008976(27) 31 31.01359(23) 32 32.02047(38) 33 33.02672(94) 34 34.03517(96)# 35 35.04249(102)# 36 36.05148(102)# 37 37.05934(103)# _________________________________________________________________________ 12 Mg 19 19.03547(27) 0.0() 24.3050(6) 20 20.018863(29) 21 21.011713(18) 22 21.9995738(14) 23 22.9941237(14) 24 23.985041700(14) 0.7899(4) 25 24.98583692(3) 0.1000(1) 26 25.982592929(30) 0.1101(3) 27 26.98434059(5) 28 27.9838768(22) 29 28.988600(15) 30 29.990434(9) 31 30.996546(13) 32 31.998975(19) 33 33.005254(21) 34 34.00946(25) 35 35.01734(43)# 36 36.02300(54)# 37 37.03140(97)# 38 38.03757(54)# 39 39.04677(55)# 40 40.05393(97)# _________________________________________________________________________ 13 Al 21 21.02804(32)# 0.0() 26.9815386(8) 22 22.01952(10)# 23 23.007267(20) 24 23.9999389(30) 25 24.9904281(5) 26 25.98689169(6) 27 26.98153863(12) 1.0000() 28 27.98191031(14) 29 28.9804450(13) 30 29.982960(15) 31 30.983947(22) 32 31.988120(90) 33 32.990840(80) 34 33.99685(12) 35 34.99986(19) 36 36.00621(23) 37 37.01068(36) 38 38.01723(78) 39 39.02297(158) 40 40.03145(75)# 41 41.03833(86)# 42 42.04689(97)# _________________________________________________________________________ 14 Si 22 22.03453(22)# 0.0() 28.0855(3) r 23 23.02552(21)# 24 24.011546(21) 25 25.004106(11) 26 25.992330(3) 27 26.98670491(16) 28 27.9769265325(19) 0.92223(19) 29 28.976494700(22) 0.04685(8) 30 29.97377017(3) 0.03092(11) 31 30.97536323(4) 32 31.97414808(5) 33 32.978000(17) 34 33.978576(15) 35 34.984580(40) 36 35.98660(13) 37 36.99294(18) 38 37.99563(15) 39 39.00207(36) 40 40.00587(60) 41 41.01456(198) 42 42.01979(54)# 43 43.02866(75)# 44 44.03526(86)# _________________________________________________________________________ 15 P 24 24.03435(54)# 0.0() 30.973762(2) 25 25.02026(21)# 26 26.01178(21)# 27 26.999230(28) 28 27.992315(4) 29 28.9818006(6) 30 29.9783138(3) 31 30.97376163(20) 1.0000() 32 31.97390727(20) 33 32.9717255(12) 34 33.973636(5) 35 34.9733141(20) 36 35.978260(14) 37 36.979610(40) 38 37.98416(11) 39 38.98618(11) 40 39.99130(15) 41 40.99434(23) 42 42.00101(48) 43 43.00619(104) 44 44.01299(75)# 45 45.01922(86)# 46 46.02738(97)# _________________________________________________________________________ 16 S 26 26.02788(32)# 0.0() 32.065(5) g,r 27 27.01883(22)# 28 28.00437(17) 29 28.996610(50) 30 29.984903(3) 31 30.9795547(16) 32 31.97207100(15) 0.9499(26) 33 32.97145876(15) 0.0075(2) 34 33.96786690(12) 0.0425(24) 35 34.96903216(11) 36 35.96708076(20) 0.0001(1) 37 36.97112557(21) 38 37.971163(8) 39 38.975130(50) 40 39.97545(15) 41 40.97958(13) 42 41.98102(13) 43 42.98715(22) 44 43.99021(42) 45 44.99651(187) 46 46.00075(75)# 47 47.00859(86)# 48 48.01417(97)# 49 49.02362(102)# _________________________________________________________________________ 17 Cl 28 28.02851(54)# 0.0() 35.453(2) m 29 29.01411(21)# 30 30.00477(21)# 31 30.992410(50) 32 31.985690(7) 33 32.9774519(5) 34 33.97376282(19) 35 34.96885268(4) 0.7576(10) 36 35.96830698(8) 37 36.96590259(5) 0.2424(10) 38 37.96801043(10) 39 38.9680082(19) 40 39.970420(30) 41 40.970680(70) 42 41.97325(15) 43 42.97405(17) 44 43.97828(12) 45 44.98029(13) 46 45.98421(77) 47 46.98871(64)# 48 47.99495(75)# 49 49.00032(86)# 50 50.00784(97)# 51 51.01449(107)# _________________________________________________________________________ 18 Ar 30 30.02156(32)# 0.0() 39.948(1) g,r,a 31 31.01212(22)# 32 31.9976380(19) 33 32.9899257(5) 34 33.9802712(4) 35 34.9752576(8) 36 35.967545106(29) 0.003365(30) 37 36.96677632(22) 38 37.9627324(4) 0.000632(5) 39 38.964313(5) 40 39.9623831225(29) 0.996003(30) 41 40.9645006(4) 42 41.963046(6) 43 42.965636(6) 44 43.9649240(17) 45 44.9680400(6) 46 45.968090(40) 47 46.97219(11) 48 47.97454(32)# 49 48.98052(54)# 50 49.98443(75)# 51 50.99163(75)# 52 51.99678(97)# 53 53.00494(107)# _________________________________________________________________________ 19 K 32 32.02192(54)# 0.0() 39.0983(1) g 33 33.00726(21)# 34 33.99841(32)# 35 34.988010(21) 36 35.981292(8) 37 36.97337589(10) 38 37.9690812(5) 39 38.96370668(20) 0.932581(44) 40 39.96399848(21) 0.000117(1) 41 40.96182576(21) 0.067302(44) 42 41.96240281(24) 43 42.960716(10) 44 43.961560(40) 45 44.960699(11) 46 45.961977(17) 47 46.961678(9) 48 47.965514(26) 49 48.967450(80) 50 49.97278(30) 51 50.97638(54)# 52 51.98261(75)# 53 52.98712(75)# 54 53.99420(97)# 55 54.99971(107)# _________________________________________________________________________ 20 Ca 34 34.01412(32)# 0.0() 40.078(4) g,f 35 35.00494(21)# 36 35.993090(40) 37 36.985870(24) 38 37.976318(5) 39 38.9707197(20) 40 39.96259098(22) 0.96941(156) 41 40.96227806(26) 42 41.95861801(27) 0.00647(23) 43 42.9587666(3) 0.00135(10) 44 43.9554818(4) 0.02086(110) 45 44.9561866(4) 46 45.9536926(24) 0.00004(3) 47 46.9545460(24) 48 47.952534(4) 0.00187(21) 49 48.955674(4) 50 49.957519(10) 51 50.96150(10) 52 51.96510(75) 53 52.97005(54)# 54 53.97435(75)# 55 54.98055(75)# 56 55.98557(97)# 57 56.99236(107)# _________________________________________________________________________ 21 Sc 36 36.01492(54)# 0.0() 44.955912(6) 37 37.00305(32)# 38 37.99470(32)# 39 38.984790(26) 40 39.977967(3) 41 40.96925113(24) 42 41.96551643(29) 43 42.9611507(20) 44 43.9594028(19) 45 44.9559119(9) 1.0000() 46 45.9551719(9) 47 46.9524075(22) 48 47.952231(6) 49 48.950024(4) 50 49.952188(17) 51 50.953603(22) 52 51.95668(21) 53 52.95961(32)# 54 53.96326(40) 55 54.96824(79) 56 55.97287(75)# 57 56.97779(75)# 58 57.98371(86)# 59 58.98922(97)# 60 59.99571(97)# _________________________________________________________________________ 22 Ti 38 38.00977(27)# 0.0() 47.867(1) 39 39.00161(22)# 40 39.99050(17) 41 40.98315(11)# 42 41.973031(6) 43 42.968522(7) 44 43.9596901(8) 45 44.9581256(11) 46 45.9526316(9) 0.0825(3) 47 46.9517631(9) 0.0744(2) 48 47.9479463(9) 0.7372(3) 49 48.9478700(9) 0.0541(2) 50 49.9447912(9) 0.0518(2) 51 50.9466150(10) 52 51.946897(8) 53 52.94973(11) 54 53.95105(13) 55 54.95527(16) 56 55.95820(21) 57 56.96399(49) 58 57.96697(75)# 59 58.97293(75)# 60 59.97676(86)# 61 60.98320(97)# 62 61.98749(97)# 63 62.99442(107)# _________________________________________________________________________ 23 V 40 40.01109(54)# 0.0() 50.9415(1) 41 40.99978(22)# 42 41.99123(21)# 43 42.98065(25)# 44 43.97411(13) 45 44.965776(18) 46 45.9602005(11) 47 46.9549089(9) 48 47.9522537(27) 49 48.9485161(12) 50 49.9471585(11) 0.00250(4) 51 50.9439595(11) 0.99750(4) 52 51.9447755(11) 53 52.944338(3) 54 53.946440(16) 55 54.94723(11) 56 55.95053(22) 57 56.95256(25) 58 57.95683(27) 59 58.96021(33) 60 59.96503(51) 61 60.96848(43)# 62 61.97378(54)# 63 62.97755(64)# 64 63.98347(75)# 65 64.98792(86)# _________________________________________________________________________ 24 Cr 42 42.00643(32)# 0.0() 51.9961(6) 43 42.99771(24)# 44 43.985550(50)# 45 44.97964(54) 46 45.968359(21) 47 46.962900(15) 48 47.954032(8) 49 48.9513357(26) 50 49.9460442(11) 0.04345(13) 51 50.9447674(11) 52 51.9405075(8) 0.83789(18) 53 52.9406494(8) 0.09501(17) 54 53.9388804(8) 0.02365(7) 55 54.9408397(8) 56 55.9406531(20) 57 56.9436130(20) 58 57.94435(22) 59 58.94859(26) 60 59.95008(23) 61 60.95472(27) 62 61.95661(36) 63 62.96186(32)# 64 63.96441(43)# 65 64.97016(54)# 66 65.97338(64)# 67 66.97955(75)# _________________________________________________________________________ 25 Mn 44 44.00687(54)# 0.0() 54.938045(5) 45 44.99451(32)# 46 45.98672(12)# 47 46.97610(17)# 48 47.96852(12) 49 48.959618(26) 50 49.9542382(11) 51 50.9482108(11) 52 51.9455655(21) 53 52.9412901(9) 54 53.9403589(14) 55 54.9380451(7) 1.0000() 56 55.9389049(7) 57 56.9382854(20) 58 57.939980(30) 59 58.940440(30) 60 59.942910(90) 61 60.94465(24) 62 61.94843(24) 63 62.95024(28) 64 63.95425(29) 65 64.95634(58) 66 65.96108(43)# 67 66.96414(54)# 68 67.96930(64)# 69 68.97284(86)# _________________________________________________________________________ 26 Fe 45 45.01458(24)# 0.0() 55.845(2) 46 46.00081(38)# 47 46.99289(28)# 48 47.980500(80)# 49 48.97361(16)# 50 49.962990(60) 51 50.956820(16) 52 51.948114(7) 53 52.9453079(19) 54 53.9396105(7) 0.05845(35) 55 54.9382934(7) 56 55.9349375(7) 0.91754(36) 57 56.9353940(7) 0.02119(10) 58 57.9332756(8) 0.00282(4) 59 58.9348755(8) 60 59.934072(4) 61 60.936745(21) 62 61.936767(16) 63 62.94037(18) 64 63.94120(30) 65 64.94538(26) 66 65.94678(32) 67 66.95095(45) 68 67.95370(75) 69 68.95878(54)# 70 69.96146(64)# 71 70.96672(86)# 72 71.96962(86)# _________________________________________________________________________ 27 Co 47 47.01149(54)# 0.0() 58.933195(5) 48 48.00176(43)# 49 48.98972(28)# 50 49.98154(18)# 51 50.97072(16)# 52 51.963590(70)# 53 52.954219(19) 54 53.9484596(8) 55 54.9419990(8) 56 55.9398393(23) 57 56.9362914(8) 58 57.9357528(13) 59 58.9331950(7) 1.0000() 60 59.9338171(7) 61 60.9324758(10) 62 61.934051(21) 63 62.933612(21) 64 63.935810(21) 65 64.936478(14) 66 65.93976(27) 67 66.94089(34) 68 67.94487(34) 69 68.94632(36) 70 69.95100(90) 71 70.95290(90) 72 71.95781(64)# 73 72.96024(75)# 74 73.96538(86)# 75 74.96833(86)# _________________________________________________________________________ 28 Ni 48 48.01975(54)# 0.0() 58.6934(4) 49 49.00966(43)# 50 49.99593(28)# 51 50.98772(28)# 52 51.975680(90)# 53 52.96847(17)# 54 53.957910(50) 55 54.951330(12) 56 55.942132(12) 57 56.9397935(19) 58 57.9353429(7) 0.680769(89) 59 58.9343467(7) 60 59.9307864(7) 0.262231(77) 61 60.9310560(7) 0.011399(6) 62 61.9283451(6) 0.036345(17) 63 62.9296694(6) 64 63.9279660(7) 0.009256(9) 65 64.9300843(7) 66 65.9291393(15) 67 66.931569(3) 68 67.931869(3) 69 68.935610(4) 70 69.93650(37) 71 70.94074(40) 72 71.94209(47) 73 72.94647(32)# 74 73.94807(43)# 75 74.95287(43)# 76 75.95533(97)# 77 76.96055(54)# 78 77.96318(118)# _________________________________________________________________________ 29 Cu 52 51.99718(28)# 0.0() 63.546(3) r 53 52.98555(28)# 54 53.97671(23)# 55 54.96605(32)# 56 55.95856(15)# 57 56.949211(17) 58 57.9445385(17) 59 58.9394980(8) 60 59.9373650(18) 61 60.9334578(11) 62 61.932584(4) 63 62.9295975(6) 0.6915(15) 64 63.9297642(6) 65 64.9277895(7) 0.3085(15) 66 65.9288688(7) 67 66.9277303(13) 68 67.9296109(17) 69 68.9294293(15) 70 69.9323923(17) 71 70.9326768(16) 72 71.9358203(15) 73 72.936675(4) 74 73.939875(7) 75 74.94190(105) 76 75.945275(7) 77 76.94785(43)# 78 77.95196(43)# 79 78.95456(54)# 80 79.96087(64)# _________________________________________________________________________ 30 Zn 54 53.99295(43)# 0.0() 65.38(2) 55 54.98398(27)# 56 55.97238(28)# 57 56.96479(11)# 58 57.954590(50) 59 58.949260(40) 60 59.941827(11) 61 60.939511(17) 62 61.934330(11) 63 62.9332116(17) 64 63.9291422(7) 0.48268(321) 65 64.9292410(7) 66 65.9260334(10) 0.27975(77) 67 66.9271273(10) 0.04102(21) 68 67.9248442(10) 0.19024(123) 69 68.9265503(10) 70 69.9253193(21) 0.00631(9) 71 70.927722(11) 72 71.926858(7) 73 72.929780(40) 74 73.929460(50) 75 74.932940(80) 76 75.933290(90) 77 76.93696(13) 78 77.93844(10) 79 78.94265(28)# 80 79.94434(18) 81 80.95048(32)# 82 81.95442(54)# 83 82.96103(54)# _________________________________________________________________________ 31 Ga 56 55.99491(28)# 0.0() 69.723(1) 57 56.98293(28)# 58 57.97425(23)# 59 58.96337(18)# 60 59.95706(12)# 61 60.949450(60) 62 61.944175(30) 63 62.9392942(14) 64 63.9368387(22) 65 64.9327348(9) 66 65.931589(3) 67 66.9282017(14) 68 67.9279801(16) 69 68.9255736(13) 0.60108(9) 70 69.9260220(13) 71 70.9247013(11) 0.39892(9) 72 71.9263663(11) 73 72.9251747(18) 74 73.926946(4) 75 74.9265002(26) 76 75.9288276(21) 77 76.9291543(26) 78 77.9316082(26) 79 78.93289(11) 80 79.93652(13) 81 80.93775(21) 82 81.94299(32)# 83 82.94698(32)# 84 83.95265(43)# 85 84.95700(54)# 86 85.96312(86)# _________________________________________________________________________ 32 Ge 58 57.99101(34)# 0.0() 72.64(1) 59 58.98175(30)# 60 59.97019(25)# 61 60.96379(32)# 62 61.95465(15)# 63 62.94964(21)# 64 63.941650(30) 65 64.93944(11) 66 65.933840(30) 67 66.932734(5) 68 67.928094(7) 69 68.9279645(14) 70 69.9242474(11) 0.2038(18) 71 70.9249510(11) 72 71.9220758(18) 0.2731(26) 73 72.9234589(18) 0.0776(8) 74 73.9211778(18) 0.3672(15) 75 74.9228589(18) 76 75.9214026(18) 0.0783(7) 77 76.9235486(18) 78 77.922853(4) 79 78.92540(10) 80 79.925370(30) 81 80.92882(13) 82 81.92955(26) 83 82.93462(21)# 84 83.93747(32)# 85 84.94303(43)# 86 85.94649(54)# 87 86.95251(54)# 88 87.95691(75)# 89 88.96383(97)# _________________________________________________________________________ 33 As 60 59.99313(64)# 0.0() 74.92160(2) 61 60.98062(64)# 62 61.97320(32)# 63 62.96369(54)# 64 63.95757(38)# 65 64.94956(32)# 66 65.94471(73) 67 66.93919(11) 68 67.936770(50) 69 68.932270(30) 70 69.930920(50) 71 70.927112(5) 72 71.926752(5) 73 72.923825(4) 74 73.9239287(25) 75 74.9215965(20) 1.0000() 76 75.9223940(20) 77 76.9206473(25) 78 77.921827(11) 79 78.920948(6) 80 79.922534(25) 81 80.922132(6) 82 81.92450(21) 83 82.92498(24) 84 83.92906(32)# 85 84.93202(21)# 86 85.93650(32)# 87 86.93990(32)# 88 87.94494(54)# 89 88.94939(54)# 90 89.95550(86)# 91 90.96043(97)# 92 91.96680(97)# _________________________________________________________________________ 34 Se 65 64.96466(64)# 0.0() 78.96(3) 66 65.95521(32)# 67 66.95009(21)# 68 67.941800(40) 69 68.939560(40) 70 69.933390(70) 71 70.932240(30) 72 71.927112(13) 73 72.926765(11) 74 73.9224764(18) 0.0089(4) 75 74.9225234(18) 76 75.9192136(18) 0.0937(29) 77 76.9199140(18) 0.0763(16) 78 77.9173091(18) 0.2377(28) 79 78.9184991(18) 80 79.9165213(21) 0.4961(41) 81 80.9179925(22) 82 81.9166994(22) 0.0873(22) 83 82.919118(4) 84 83.918462(16) 85 84.922250(30) 86 85.924272(17) 87 86.928520(40) 88 87.931420(50) 89 88.93645(32)# 90 89.93996(43)# 91 90.94596(54)# 92 91.94992(64)# 93 92.95629(86)# 94 93.96049(86)# _________________________________________________________________________ 35 Br 67 66.96479(54)# 0.0() 79.904(1) 68 67.95852(38)# 69 68.95011(11)# 70 69.94479(33)# 71 70.93874(61) 72 71.936640(60) 73 72.931690(50) 74 73.929891(16) 75 74.925776(15) 76 75.924541(10) 77 76.921379(3) 78 77.921146(4) 79 78.9183371(22) 0.5069(7) 80 79.9185293(22) 81 80.9162906(21) 0.4931(7) 82 81.9168041(21) 83 82.915180(5) 84 83.916479(16) 85 84.915608(21) 86 85.918798(12) 87 86.920711(19) 88 87.924070(40) 89 88.926390(60) 90 89.930630(80) 91 90.933970(80) 92 91.939260(50) 93 92.94305(32)# 94 93.94868(43)# 95 94.95287(54)# 96 95.95853(75)# 97 96.96280(86)# _________________________________________________________________________ 36 Kr 69 68.96518(43)# 0.0() 83.798(2) g,m,a 70 69.95526(41)# 71 70.94963(70) 72 71.942092(9) 73 72.939289(7) 74 73.9330844(22) 75 74.930946(9) 76 75.925910(4) 77 76.9246700(21) 78 77.9203648(12) 0.00355(3) 79 78.920082(4) 80 79.9163790(16) 0.02286(10) 81 80.9165920(21) 82 81.9134836(19) 0.11593(31) 83 82.914136(3) 0.11500(19) 84 83.911507(3) 0.56987(15) 85 84.9125273(21) 86 85.91061073(11) 0.17279(41) 87 86.91335486(29) 88 87.914447(14) 89 88.917630(60) 90 89.919517(20) 91 90.923450(60) 92 91.926156(13) 93 92.93127(11) 94 93.93436(32)# 95 94.93984(43)# 96 95.94307(54)# 97 96.94856(54)# 98 97.95191(64)# 99 98.95760(64)# 100 99.96114(54)# _________________________________________________________________________ 37 Rb 71 70.96532(54)# 0.0() 85.4678(3) g 72 71.95908(54)# 73 72.95056(16)# 74 73.944265(4) 75 74.938570(8) 76 75.9350722(20) 77 76.930408(8) 78 77.928141(8) 79 78.923989(6) 80 79.922519(7) 81 80.918996(6) 82 81.9182086(30) 83 82.915110(6) 84 83.914385(3) 85 84.911789738(12) 0.7217(2) 86 85.91116742(21) 87 86.909180527(13) 0.2783(2) 88 87.91131559(17) 89 88.912278(6) 90 89.914802(7) 91 90.916537(9) 92 91.919729(7) 93 92.922042(8) 94 93.926405(9) 95 94.929303(23) 96 95.934270(30) 97 96.937350(30) 98 97.941790(50) 99 98.94538(13) 100 99.94987(32)# 101 100.95320(18) 102 101.95887(54)# _________________________________________________________________________ 38 Sr 73 72.96597(64)# 0.0() 87.62(1) g,r,f 74 73.95631(54)# 75 74.94995(24) 76 75.941770(40) 77 76.937945(10) 78 77.932180(8) 79 78.929708(9) 80 79.924521(7) 81 80.923212(7) 82 81.918402(6) 83 82.917557(11) 84 83.913425(3) 0.0056(1) 85 84.912933(3) 86 85.9092602(12) 0.0986(1) 87 86.9088771(12) 0.0700(1) 88 87.9056121(12) 0.8258(1) 89 88.9074507(12) 90 89.907738(3) 91 90.910203(5) 92 91.911038(4) 93 92.914026(8) 94 93.915361(8) 95 94.919359(8) 96 95.921697(29) 97 96.926153(21) 98 97.928453(28) 99 98.933240(90) 100 99.93535(14) 101 100.94052(13) 102 101.94302(12) 103 102.94895(54)# 104 103.95233(75)# 105 104.95858(75)# _________________________________________________________________________ 39 Y 76 75.95845(54)# 0.0() 88.90585(2) 77 76.949650(70)# 78 77.94361(43)# 79 78.93735(48) 80 79.93428(19) 81 80.929130(70) 82 81.92679(11) 83 82.922350(50) 84 83.92039(10) 85 84.916433(20) 86 85.914886(15) 87 86.9108757(17) 88 87.9095011(20) 89 88.9058483(27) 1.0000() 90 89.9071519(27) 91 90.907305(3) 92 91.908949(10) 93 92.909583(11) 94 93.911595(8) 95 94.912821(8) 96 95.915891(25) 97 96.918134(13) 98 97.922203(26) 99 98.924636(26) 100 99.927760(80) 101 100.93031(10) 102 101.933560(90) 103 102.93673(32)# 104 103.94105(43)# 105 104.94487(54)# 106 105.94979(75)# 107 106.95414(54)# 108 107.95948(86)# _________________________________________________________________________ 40 Zr 78 77.95523(54)# 0.0() 91.224(2) g 79 78.94916(43)# 80 79.94040(160) 81 80.93721(18) 82 81.93109(24)# 83 82.92865(10) 84 83.92325(21)# 85 84.92147(11) 86 85.916470(30) 87 86.914816(9) 88 87.910227(11) 89 88.908890(4) 90 89.9047044(25) 0.5145(40) 91 90.9056458(25) 0.1122(5) 92 91.9050408(25) 0.1715(8) 93 92.9064760(25) 94 93.9063152(26) 0.1738(28) 95 94.9080426(26) 96 95.9082734(30) 0.0280(9) 97 96.9109531(30) 98 97.912735(21) 99 98.916512(22) 100 99.917760(40) 101 100.921140(30) 102 101.922980(50) 103 102.92660(12) 104 103.92878(43)# 105 104.93305(43)# 106 105.93591(54)# 107 106.94075(32)# 108 107.94396(64)# 109 108.94924(54)# 110 109.95287(86)# _________________________________________________________________________ 41 Nb 81 80.94903(161)# 0.0() 92.90638(2) 82 81.94313(32)# 83 82.93671(34) 84 83.93357(32)# 85 84.92791(24) 86 85.925040(90) 87 86.920360(70) 88 87.91833(11) 89 88.913418(29) 90 89.911265(5) 91 90.906996(4) 92 91.907194(3) 93 92.9063781(26) 1.0000() 94 93.9072839(26) 95 94.9068358(21) 96 95.908101(4) 97 96.9080986(27) 98 97.910328(6) 99 98.911618(14) 100 99.914182(28) 101 100.915252(20) 102 101.918040(40) 103 102.919140(70) 104 103.92246(11) 105 104.92394(11) 106 105.92797(21)# 107 106.93031(43)# 108 107.93484(32)# 109 108.93763(54)# 110 109.94244(54)# 111 110.94565(54)# 112 111.95083(75)# 113 112.95470(86)# _________________________________________________________________________ 42 Mo 83 82.94874(54)# 0.0() 95.96(2) g 84 83.94009(43)# 85 84.93655(30)# 86 85.93070(47) 87 86.92733(24) 88 87.921953(22) 89 88.919480(17) 90 89.913937(7) 91 90.911750(12) 92 91.906811(4) 0.1477(31) 93 92.906813(4) 94 93.9050883(21) 0.0923(10) 95 94.9058421(21) 0.1590(9) 96 95.9046795(21) 0.1668(1) 97 96.9060215(21) 0.0956(5) 98 97.9054082(21) 0.2419(26) 99 98.9077119(21) 100 99.907477(6) 0.0967(20) 101 100.910347(6) 102 101.910297(22) 103 102.913210(70) 104 103.913760(60) 105 104.916970(80) 106 105.918137(19) 107 106.92169(17) 108 107.92345(21)# 109 108.92781(32)# 110 109.92973(43)# 111 110.93441(43)# 112 111.93684(64)# 113 112.94188(64)# 114 113.94492(75)# 115 114.95029(86)# _________________________________________________________________________ 43 Tc 85 84.94883(43)# 0.0() [98] 86 85.94288(32)# 87 86.93653(32)# 88 87.93268(22)# 89 88.92717(22)# 90 89.92356(26) 91 90.91843(22) 92 91.915260(28) 93 92.910249(4) 94 93.909657(5) 95 94.907657(6) 96 95.907871(6) 97 96.906365(5) 98 97.907216(4) 99 98.9062547(21) 100 99.9076578(24) 101 100.907315(26) 102 101.909215(10) 103 102.909181(11) 104 103.911450(50) 105 104.911660(60) 106 105.914358(14) 107 106.91508(16) 108 107.91846(14) 109 108.91998(10) 110 109.923820(80) 111 110.92569(12) 112 111.92915(13) 113 112.93159(32)# 114 113.93588(64)# 115 114.93869(75)# 116 115.94337(75)# 117 116.94648(75)# 118 117.95148(97)# _________________________________________________________________________ 44 Ru 87 86.94918(64)# 0.0() 101.07(2) g 88 87.94026(43)# 89 88.93611(54)# 90 89.92989(32)# 91 90.92629(63)# 92 91.92012(32)# 93 92.917050(90) 94 93.911360(14) 95 94.910413(13) 96 95.907598(8) 0.0554(14) 97 96.907555(9) 98 97.905287(7) 0.0187(3) 99 98.9059393(22) 0.1276(14) 100 99.9042195(22) 0.1260(7) 101 100.9055821(22) 0.1706(2) 102 101.9043493(22) 0.3155(14) 103 102.9063238(22) 104 103.905433(3) 0.1862(27) 105 104.907753(3) 106 105.907329(8) 107 106.90991(13) 108 107.91017(12) 109 108.913200(70) 110 109.914140(60) 111 110.917700(80) 112 111.918970(80) 113 112.922490(80) 114 113.92428(25)# 115 114.92869(14) 116 115.93081(75)# 117 116.93558(75)# 118 117.93782(86)# 119 118.94284(75)# 120 119.94531(86)# _________________________________________________________________________ 45 Rh 89 88.94884(48)# 0.0() 102.90550(2) 90 89.94287(54)# 91 90.93655(43)# 92 91.93198(43)# 93 92.92574(43)# 94 93.92170(48)# 95 94.91590(16) 96 95.914461(14) 97 96.911340(40) 98 97.910708(13) 99 98.908132(8) 100 99.908122(20) 101 100.906164(18) 102 101.906843(5) 103 102.905504(3) 1.0000() 104 103.906656(3) 105 104.905694(4) 106 105.907287(8) 107 106.906748(13) 108 107.90873(11) 109 108.908737(13) 110 109.911140(50) 111 110.911590(30) 112 111.914390(60) 113 112.915530(50) 114 113.91881(12) 115 114.920330(90) 116 115.92406(15) 117 116.92598(54)# 118 117.93007(54)# 119 118.93211(64)# 120 119.93641(64)# 121 120.93872(97)# 122 121.94321(75)# _________________________________________________________________________ 46 Pd 91 90.94911(61)# 0.0() 106.42(1) g 92 91.94042(54)# 93 92.93591(43)# 94 93.92877(43)# 95 94.92469(43)# 96 95.91816(16) 97 96.91648(32) 98 97.912721(23) 99 98.911768(16) 100 99.908506(12) 101 100.908289(19) 102 101.905609(3) 0.0102(1) 103 102.906087(3) 104 103.904036(4) 0.1114(8) 105 104.905085(4) 0.2233(8) 106 105.903486(4) 0.2733(3) 107 106.905133(4) 108 107.903892(4) 0.2646(9) 109 108.905950(4) 110 109.905153(12) 0.1172(9) 111 110.907671(12) 112 111.907314(19) 113 112.910150(40) 114 113.910363(25) 115 114.913680(70) 116 115.914160(60) 117 116.917840(60) 118 117.91898(23) 119 118.92311(32)# 120 119.92469(13) 121 120.92887(54)# 122 121.93055(43)# 123 122.93493(64)# 124 123.93688(54)# _________________________________________________________________________ 47 Ag 93 92.94978(64)# 0.0() 107.8682(2) g 94 93.94278(54)# 95 94.93548(43)# 96 95.93068(43)# 97 96.92397(35) 98 97.921570(70) 99 98.91760(16) 100 99.916100(80) 101 100.91280(11) 102 101.911690(30) 103 102.908973(18) 104 103.908629(6) 105 104.906529(12) 106 105.906669(5) 107 106.905097(5) 0.51839(8) 108 107.905956(5) 109 108.904752(3) 0.48161(8) 110 109.906107(3) 111 110.905291(3) 112 111.907005(18) 113 112.906567(18) 114 113.908804(27) 115 114.908760(40) 116 115.911360(50) 117 116.911680(50) 118 117.914580(70) 119 118.91567(10) 120 119.918790(80) 121 120.91985(16) 122 121.92353(22)# 123 122.92490(22)# 124 123.92864(21)# 125 124.93043(32)# 126 125.93450(32)# 127 126.93677(32)# 128 127.94117(32)# 129 128.94369(43)# 130 129.95045(36)# _________________________________________________________________________ 48 Cd 95 94.94987(64)# 0.0() 112.411(8) g 96 95.93977(54)# 97 96.93494(43)# 98 97.927400(80) 99 98.92501(22)# 100 99.92029(10) 101 100.91868(16) 102 101.914460(30) 103 102.913419(17) 104 103.909849(10) 105 104.909468(12) 106 105.906459(6) 0.0125(6) 107 106.906618(6) 108 107.904184(6) 0.0089(3) 109 108.904982(4) 110 109.9030021(29) 0.1249(18) 111 110.9041781(29) 0.1280(12) 112 111.9027578(29) 0.2413(21) 113 112.9044017(29) 0.1222(12) 114 113.9033585(29) 0.2873(42) 115 114.9054310(29) 116 115.904756(3) 0.0749(18) 117 116.907219(4) 118 117.906915(22) 119 118.909920(90) 120 119.909850(20) 121 120.912980(90) 122 121.913330(50) 123 122.917000(40) 124 123.917650(70) 125 124.921250(70) 126 125.922350(60) 127 126.926440(80) 128 127.92776(32) 129 128.93215(32)# 130 129.93390(30) 131 130.94067(32)# 132 131.94555(54)# _________________________________________________________________________ 49 In 97 96.94954(64)# 0.0() 114.818(3) 98 97.94214(21)# 99 98.93422(43)# 100 99.93111(27) 101 100.92634(32)# 102 101.92409(12) 103 102.919914(27) 104 103.918300(90) 105 104.914674(19) 106 105.913465(13) 107 106.910295(12) 108 107.909698(10) 109 108.907151(6) 110 109.907165(13) 111 110.905103(5) 112 111.905532(6) 113 112.904058(3) 0.0429(5) 114 113.904914(3) 115 114.903878(5) 0.9571(5) 116 115.905260(5) 117 116.904514(6) 118 117.906354(9) 119 118.905845(8) 120 119.907960(40) 121 120.907846(29) 122 121.910280(50) 123 122.910438(26) 124 123.913180(50) 125 124.913600(30) 126 125.916460(40) 127 126.917350(40) 128 127.920170(50) 129 128.921700(50) 130 129.924970(40) 131 130.926850(30) 132 131.932990(70) 133 132.93781(32)# 134 133.94415(43)# 135 134.94933(54)# _________________________________________________________________________ 50 Sn 99 98.94933(64)# 0.0() 118.710(7) g,e 100 99.93904(76) 101 100.93606(32)# 102 101.93030(14) 103 102.92810(32)# 104 103.92314(11) 105 104.921350(90) 106 105.916880(50) 107 106.915640(90) 108 107.911925(21) 109 108.911283(11) 110 109.907843(15) 111 110.907734(7) 112 111.904818(5) 0.0097(1) 113 112.905171(4) 114 113.902779(3) 0.0066(1) 115 114.903342(3) 0.0034(1) 116 115.901741(3) 0.1454(9) 117 116.902952(3) 0.0768(7) 118 117.901603(3) 0.2422(9) 119 118.903308(3) 0.0859(4) 120 119.9021947(27) 0.3258(9) 121 120.9042355(27) 122 121.9034390(29) 0.0463(3) 123 122.9057208(29) 124 123.9052739(15) 0.0579(5) 125 124.9077841(16) 126 125.907653(11) 127 126.910360(26) 128 127.910537(29) 129 128.913480(30) 130 129.913967(11) 131 130.917000(23) 132 131.917816(15) 133 132.923830(40) 134 133.92829(11) 135 134.93473(43)# 136 135.93934(54)# 137 136.94599(64)# _________________________________________________________________________ 51 Sb 103 102.93969(32)# 0.0() 121.760(1) g 104 103.93647(39)# 105 104.93149(11) 106 105.92879(34)# 107 106.92415(32)# 108 107.92216(22)# 109 108.918132(20) 110 109.91675(22)# 111 110.913160(30) 112 111.912398(19) 113 112.909372(19) 114 113.909270(30) 115 114.906598(17) 116 115.906794(6) 117 116.904836(10) 118 117.905529(4) 119 118.903942(9) 120 119.905072(8) 121 120.9038157(24) 0.5721(5) 122 121.9051737(24) 123 122.9042140(22) 0.4279(5) 124 123.9059357(22) 125 124.9052538(28) 126 125.907250(30) 127 126.906924(6) 128 127.909169(27) 129 128.909148(23) 130 129.911656(18) 131 130.911982(22) 132 131.914467(15) 133 132.915252(27) 134 133.920380(50) 135 134.92517(11) 136 135.93035(32)# 137 136.93531(43)# 138 137.94079(32)# 139 138.94598(54)# _________________________________________________________________________ 52 Te 105 104.94364(54)# 0.0() 127.60(3) g,h 106 105.93750(14) 107 106.93501(32)# 108 107.92944(11) 109 108.927420(70) 110 109.922410(60) 111 110.921110(80) 112 111.91701(18) 113 112.915890(30) 114 113.912090(30) 115 114.911900(30) 116 115.908460(30) 117 116.908645(14) 118 117.905828(16) 119 118.906404(9) 120 119.904020(10) 0.0009(1) 121 120.904936(28) 122 121.9030439(16) 0.0255(12) 123 122.9042700(16) 0.0089(3) 124 123.9028179(16) 0.0474(14) 125 124.9044307(16) 0.0707(15) 126 125.9033117(16) 0.1884(25) 127 126.9052263(16) 128 127.9044631(19) 0.3174(8) 129 128.9065982(19) 130 129.9062244(21) 0.3408(62) 131 130.9085239(21) 132 131.908553(7) 133 132.910955(26) 134 133.911369(11) 135 134.91645(10) 136 135.920100(50) 137 136.92532(13) 138 137.92922(22)# 139 138.93473(43)# 140 139.93885(32)# 141 140.94465(43)# 142 141.94908(64)# _________________________________________________________________________ 53 I 108 107.94348(39)# 0.0() 126.90447(3) 109 108.93815(11) 110 109.93524(33)# 111 110.93028(32)# 112 111.92797(23)# 113 112.923640(60) 114 113.92185(32)# 115 114.918050(30) 116 115.91681(10) 117 116.913650(30) 118 117.913074(21) 119 118.910070(30) 120 119.910048(19) 121 120.907367(11) 122 121.907589(6) 123 122.905589(4) 124 123.9062099(25) 125 124.9046302(16) 126 125.905624(4) 127 126.904473(4) 1.0000() 128 127.905809(4) 129 128.904988(3) 130 129.906674(3) 131 130.9061246(12) 132 131.907997(6) 133 132.907797(5) 134 133.909744(9) 135 134.910048(8) 136 135.914650(50) 137 136.917871(30) 138 137.922350(90) 139 138.926100(30) 140 139.93100(21)# 141 140.93503(21)# 142 141.94018(43)# 143 142.94456(43)# 144 143.94999(54)# _________________________________________________________________________ 54 Xe 110 109.94428(14) 0.0() 131.293(6) g,m,a 111 110.94160(33)# 112 111.93562(11) 113 112.933340(90) 114 113.927980(12) 115 114.926294(13) 116 115.921581(14) 117 116.920359(11) 118 117.916179(11) 119 118.915411(11) 120 119.911784(13) 121 120.911462(12) 122 121.908368(12) 123 122.908482(10) 124 123.9058930(20) 0.000952(3) 125 124.9063955(20) 126 125.904274(7) 0.000890(2) 127 126.905184(4) 128 127.9035313(15) 0.019102(8) 129 128.9047794(8) 0.264006(82) 130 129.9035080(8) 0.040710(13) 131 130.9050824(10) 0.212324(30) 132 131.9041535(10) 0.269086(33) 133 132.9059107(26) 134 133.9053945(9) 0.104357(21) 135 134.907227(5) 136 135.907219(8) 0.088573(44) 137 136.911562(8) 138 137.913950(50) 139 138.918793(22) 140 139.921640(70) 141 140.92665(10) 142 141.92971(11) 143 142.93511(21)# 144 143.93851(32)# 145 144.94407(32)# 146 145.94775(43)# 147 146.95356(43)# _________________________________________________________________________ 55 Cs 112 111.95030(33)# 0.0() 132.9054519(2) 113 112.94449(11) 114 113.94145(33)# 115 114.93591(32)# 116 115.93337(11)# 117 116.928670(70) 118 117.926559(14) 119 118.922377(15) 120 119.920677(11) 121 120.917229(15) 122 121.916110(30) 123 122.912996(13) 124 123.912258(9) 125 124.909728(8) 126 125.909452(13) 127 126.907418(6) 128 127.907749(6) 129 128.906064(5) 130 129.906709(9) 131 130.905464(5) 132 131.9064343(20) 133 132.905451933(24) 1.0000() 134 133.906718475(28) 135 134.9059770(11) 136 135.9073116(20) 137 136.9070895(5) 138 137.911017(10) 139 138.913364(3) 140 139.917282(9) 141 140.920046(11) 142 141.924299(11) 143 142.927352(25) 144 143.932077(28) 145 144.935526(12) 146 145.940290(80) 147 146.944160(60) 148 147.94922(62) 149 148.95293(21)# 150 149.95817(32)# 151 150.96219(54)# _________________________________________________________________________ 56 Ba 114 113.95068(15) 0.0() 137.327(7) 115 114.94737(64)# 116 115.94138(43)# 117 116.93850(32)# 118 117.93304(21)# 119 118.93066(21) 120 119.92604(32) 121 120.92405(15) 122 121.919900(30) 123 122.918781(13) 124 123.915094(13) 125 124.914473(12) 126 125.911250(13) 127 126.911094(12) 128 127.908318(11) 129 128.908679(12) 130 129.9063208(30) 0.00106(1) 131 130.906941(3) 132 131.9050613(11) 0.00101(1) 133 132.9060075(11) 134 133.9045084(4) 0.02417(18) 135 134.9056886(4) 0.06592(12) 136 135.9045759(4) 0.07854(24) 137 136.9058274(5) 0.11232(24) 138 137.9052472(5) 0.71698(42) 139 138.9088413(5) 140 139.910605(9) 141 140.914411(9) 142 141.916453(7) 143 142.920627(14) 144 143.922953(14) 145 144.927630(80) 146 145.930220(80) 147 146.93495(22)# 148 147.937720(90) 149 148.94258(21)# 150 149.94568(43)# 151 150.95081(43)# 152 151.95427(54)# 153 152.95961(86)# _________________________________________________________________________ 57 La 117 116.95007(43)# 0.0() 138.90547(7) g 118 117.94673(32)# 119 118.94099(43)# 120 119.93807(54)# 121 120.93301(54)# 122 121.93071(32)# 123 122.92624(21)# 124 123.924570(60) 125 124.920816(28) 126 125.91951(10) 127 126.916375(28) 128 127.915590(60) 129 128.912693(22) 130 129.912369(28) 131 130.910070(30) 132 131.910100(40) 133 132.908220(30) 134 133.908514(21) 135 134.906977(11) 136 135.907640(60) 137 136.906494(14) 138 137.907112(4) 0.00090(1) 139 138.9063533(26) 0.99910(1) 140 139.9094776(26) 141 140.910962(5) 142 141.914079(6) 143 142.916063(17) 144 143.919600(50) 145 144.92165(10) 146 145.925790(80) 147 146.928240(50) 148 147.932230(60) 149 148.93473(34)# 150 149.93877(43)# 151 150.94172(43)# 152 151.94625(43)# 153 152.94962(64)# 154 153.95450(64)# 155 154.95835(86)# _________________________________________________________________________ 58 Ce 119 118.95276(64)# 0.0() 140.116(1) g,f 120 119.94664(75)# 121 120.94342(54)# 122 121.93791(43)# 123 122.93540(32)# 124 123.93041(32)# 125 124.92844(21)# 126 125.923970(30) 127 126.922730(60) 128 127.918910(30) 129 128.918100(30) 130 129.914740(30) 131 130.914420(40) 132 131.911460(22) 133 132.911515(18) 134 133.908925(22) 135 134.909151(12) 136 135.907172(14) 0.00185(2) 137 136.907806(14) 138 137.905991(11) 0.00251(2) 139 138.906653(8) 140 139.9054387(26) 0.88450(51) 141 140.9082763(26) 142 141.909244(3) 0.11114(51) 143 142.912386(3) 144 143.913647(4) 145 144.917230(40) 146 145.918760(70) 147 146.922670(30) 148 147.924430(30) 149 148.92840(10) 150 149.930410(50) 151 150.93398(11) 152 151.93654(21)# 153 152.94058(43)# 154 153.94342(54)# 155 154.94804(64)# 156 155.95126(64)# 157 156.95634(75)# _________________________________________________________________________ 59 Pr 121 120.95536(75)# 0.0() 140.90765(2) 122 121.95181(54)# 123 122.94596(64)# 124 123.94296(64)# 125 124.93783(43)# 126 125.93531(21)# 127 126.93083(21)# 128 127.928790(30) 129 128.925100(30) 130 129.923590(70) 131 130.920260(60) 132 131.919260(60) 133 132.916331(13) 134 133.915710(40) 135 134.913112(13) 136 135.912692(13) 137 136.910705(13) 138 137.910755(15) 139 138.908938(8) 140 139.909076(7) 141 140.9076528(26) 1.0000() 142 141.9100448(26) 143 142.9108169(28) 144 143.913305(4) 145 144.914512(8) 146 145.917640(70) 147 146.918996(25) 148 147.922135(28) 149 148.923720(90) 150 149.926673(28) 151 150.928319(25) 152 151.93150(13) 153 152.93384(11) 154 153.93752(16) 155 154.94012(32)# 156 155.94427(43)# 157 156.94743(43)# 158 157.95198(64)# 159 158.95550(75)# _________________________________________________________________________ 60 Nd 124 123.95223(64)# 0.0() 144.242(3) g,f 125 124.94888(43)# 126 125.94322(43)# 127 126.94050(43)# 128 127.93539(21)# 129 128.93319(22)# 130 129.928510(30) 131 130.927250(30) 132 131.923321(26) 133 132.922350(50) 134 133.918790(13) 135 134.918181(21) 136 135.914976(13) 137 136.914567(12) 138 137.911950(13) 139 138.911978(28) 140 139.909550(30) 141 140.909610(4) 142 141.9077233(25) 0.272(5) 143 142.9098143(25) 0.122(2) 144 143.9100873(25) 0.238(3) 145 144.9125736(25) 0.083(1) 146 145.9131169(25) 0.172(3) 147 146.9161004(25) 148 147.916893(3) 0.057(1) 149 148.920149(3) 150 149.920891(3) 0.056(2) 151 150.923829(3) 152 151.924682(26) 153 152.927698(29) 154 153.92948(12) 155 154.93293(16)# 156 155.93502(22) 157 156.93903(21)# 158 157.94160(43)# 159 158.94609(54)# 160 159.94909(64)# 161 160.95388(75)# _________________________________________________________________________ 61 Pm 126 125.95752(54)# 0.0() [145] 127 126.95163(64)# 128 127.94842(43)# 129 128.94316(43)# 130 129.94045(32)# 131 130.93587(21)# 132 131.93375(21)# 133 132.929780(50) 134 133.928350(60) 135 134.924880(60) 136 135.923570(80) 137 136.920479(14) 138 137.919548(30) 139 138.916804(14) 140 139.916040(40) 141 140.913555(15) 142 141.912874(27) 143 142.910933(4) 144 143.912591(3) 145 144.912749(3) 146 145.914696(5) 147 146.9151385(26) 148 147.917475(7) 149 148.918334(4) 150 149.920984(22) 151 150.921207(6) 152 151.923497(28) 153 152.924117(12) 154 153.926460(50) 155 154.928100(30) 156 155.931060(40) 157 156.93304(12) 158 157.93656(14) 159 158.93897(21)# 160 159.94299(32)# 161 160.94586(54)# 162 161.95029(75)# 163 162.95368(86)# _________________________________________________________________________ 62 Sm 128 127.95808(54)# 0.0() 150.36(2) g 129 128.95464(54)# 130 129.94892(43)# 131 130.94611(32)# 132 131.94069(32)# 133 132.93867(21)# 134 133.93397(21)# 135 134.93252(17) 136 135.928276(13) 137 136.926970(50) 138 137.923244(13) 139 138.922297(12) 140 139.918995(13) 141 140.918476(9) 142 141.915198(6) 143 142.914628(4) 144 143.911999(3) 0.0307(7) 145 144.913410(3) 146 145.913041(4) 147 146.9148979(26) 0.1499(18) 148 147.9148227(26) 0.1124(10) 149 148.9171847(26) 0.1382(7) 150 149.9172755(26) 0.0738(1) 151 150.9199324(26) 152 151.9197324(27) 0.2675(16) 153 152.9220974(27) 154 153.9222093(27) 0.2275(29) 155 154.9246402(28) 156 155.925528(10) 157 156.928360(50) 158 157.929990(80) 159 158.93321(11) 160 159.93514(21)# 161 160.93883(32)# 162 161.94122(54)# 163 162.94536(75)# 164 163.94828(86)# 165 164.95298(97)# _________________________________________________________________________ 63 Eu 130 129.96357(54)# 0.0() 151.964(1) g 131 130.95775(43)# 132 131.95437(43)# 133 132.94924(32)# 134 133.94651(21)# 135 134.94182(32)# 136 135.93960(21)# 137 136.93557(21)# 138 137.933710(30) 139 138.929792(14) 140 139.928090(60) 141 140.924931(14) 142 141.923430(30) 143 142.920298(12) 144 143.918817(12) 145 144.916265(4) 146 145.917206(7) 147 146.916746(3) 148 147.918086(11) 149 148.917931(5) 150 149.919702(7) 151 150.9198502(26) 0.4781(6) 152 151.9217445(26) 153 152.9212303(26) 0.5219(6) 154 153.9229792(26) 155 154.9228933(27) 156 155.924752(6) 157 156.925424(6) 158 157.927850(80) 159 158.929089(8) 160 159.93197(22)# 161 160.93368(32)# 162 161.93704(32)# 163 162.93921(54)# 164 163.94299(64)# 165 164.94572(75)# 166 165.94997(86)# 167 166.95321(86)# _________________________________________________________________________ 64 Gd 134 133.95537(43)# 0.0() 157.25(3) g 135 134.95257(54)# 136 135.94734(43)# 137 136.94502(43)# 138 137.94012(21)# 139 138.93824(21)# 140 139.933670(30) 141 140.932126(21) 142 141.928120(30) 143 142.92675(22) 144 143.922960(30) 145 144.921709(20) 146 145.918311(5) 147 146.919094(3) 148 147.918115(3) 149 148.919341(4) 150 149.918659(7) 151 150.920348(4) 152 151.9197910(27) 0.0020(1) 153 152.9217495(27) 154 153.9208656(27) 0.0218(3) 155 154.9226220(27) 0.1480(12) 156 155.9221227(27) 0.2047(9) 157 156.9239601(27) 0.1565(2) 158 157.9241039(27) 0.2484(7) 159 158.9263887(27) 160 159.9270541(27) 0.2186(19) 161 160.9296692(29) 162 161.930985(5) 163 162.93399(32)# 164 163.93586(43)# 165 164.93938(54)# 166 165.94160(64)# 167 166.94557(64)# 168 167.94836(75)# 169 168.95287(86)# _________________________________________________________________________ 65 Tb 136 135.96138(64)# 0.0() 158.92535(2) 137 136.95598(64)# 138 137.95316(43)# 139 138.94829(32)# 140 139.94581(86) 141 140.94145(11) 142 141.93874(32)# 143 142.935120(60) 144 143.933050(30) 145 144.929270(60) 146 145.927250(50) 147 146.924045(13) 148 147.924272(15) 149 148.923246(5) 150 149.923660(8) 151 150.923103(5) 152 151.924070(40) 153 152.923435(5) 154 153.924680(50) 155 154.923505(13) 156 155.924747(5) 157 156.9240246(27) 158 157.9254131(28) 159 158.9253468(27) 1.0000() 160 159.9271676(27) 161 160.9275699(28) 162 161.929490(40) 163 162.930648(5) 164 163.93335(11) 165 164.93488(21)# 166 165.93799(11) 167 166.94005(43)# 168 167.94364(54)# 169 168.94622(64)# 170 169.95025(75)# 171 170.95330(86)# _________________________________________________________________________ 66 Dy 138 137.96249(64)# 0.0() 162.500(1) g 139 138.95954(54)# 140 139.95401(54)# 141 140.95135(32)# 142 141.94637(39)# 143 142.94383(21)# 144 143.939250(30) 145 144.937430(50) 146 145.932845(29) 147 146.931092(21) 148 147.927150(11) 149 148.927305(9) 150 149.925585(5) 151 150.926185(4) 152 151.924718(6) 153 152.925765(5) 154 153.924424(8) 155 154.925754(13) 156 155.924283(7) 0.00056(3) 157 156.925466(7) 158 157.924409(4) 0.00095(3) 159 158.9257392(29) 160 159.9251975(27) 0.02329(18) 161 160.9269334(27) 0.18889(42) 162 161.9267984(27) 0.25475(36) 163 162.9287312(27) 0.24896(42) 164 163.9291748(27) 0.28260(54) 165 164.9317033(27) 166 165.9328067(28) 167 166.935660(60) 168 167.93713(15) 169 168.94031(32) 170 169.94239(21)# 171 170.94620(32)# 172 171.94876(43)# 173 172.95300(54)# _________________________________________________________________________ 67 Ho 140 139.96854(54)# 0.0() 164.93032(2) 141 140.96310(54)# 142 141.95977(54)# 143 142.95461(43)# 144 143.95148(32)# 145 144.94720(32)# 146 145.94464(21)# 147 146.940060(30) 148 147.93772(14) 149 148.933775(20) 150 149.933496(15) 151 150.931688(13) 152 151.931714(15) 153 152.930199(6) 154 153.930602(9) 155 154.929103(19) 156 155.929840(50) 157 156.928256(26) 158 157.928941(29) 159 158.927712(4) 160 159.928729(16) 161 160.927855(3) 162 161.929096(4) 163 162.9287339(27) 164 163.9302335(30) 165 164.9303221(27) 1.0000() 166 165.9322842(27) 167 166.933133(6) 168 167.935520(30) 169 168.936872(22) 170 169.939620(50) 171 170.94147(64) 172 171.94482(43)# 173 172.94729(43)# 174 173.95115(54)# 175 174.95405(64)# _________________________________________________________________________ 68 Er 143 142.96634(64)# 0.0() 167.259(3) g 144 143.96038(43)# 145 144.95739(43)# 146 145.95200(32)# 147 146.94949(32)# 148 147.94455(21)# 149 148.942310(30) 150 149.937914(18) 151 150.937449(18) 152 151.935050(11) 153 152.935063(9) 154 153.932783(6) 155 154.933209(7) 156 155.931065(26) 157 156.931920(30) 158 157.929893(27) 159 158.930684(5) 160 159.929083(26) 161 160.929995(10) 162 161.928778(4) 0.00139(5) 163 162.930033(6) 164 163.929200(3) 0.01601(3) 165 164.930726(3) 166 165.9302931(27) 0.33503(36) 167 166.9320482(27) 0.22869(9) 168 167.9323702(27) 0.26978(18) 169 168.9345904(27) 170 169.9354643(30) 0.14910(36) 171 170.9380298(30) 172 171.939356(5) 173 172.94240(21)# 174 173.94423(32)# 175 174.94777(43)# 176 175.95008(43)# 177 176.95405(54)# _________________________________________________________________________ 69 Tm 145 144.97007(43)# 0.0() 168.93421(2) 146 145.96643(43)# 147 146.96096(32)# 148 147.95784(43)# 149 148.95272(32)# 150 149.94996(21)# 151 150.945483(22) 152 151.944420(80) 153 152.942012(20) 154 153.941568(15) 155 154.939199(14) 156 155.938980(17) 157 156.936970(30) 158 157.936980(27) 159 158.934980(30) 160 159.935260(40) 161 160.933550(30) 162 161.933995(28) 163 162.932651(6) 164 163.933560(30) 165 164.932435(4) 166 165.933554(13) 167 166.9328516(29) 168 167.934173(3) 169 168.9342133(27) 1.0000() 170 169.9358014(27) 171 170.9364294(28) 172 171.938400(6) 173 172.939604(5) 174 173.942170(50) 175 174.943840(50) 176 175.94699(11) 177 176.94904(32)# 178 177.95264(43)# 179 178.95534(54)# _________________________________________________________________________ 70 Yb 148 147.96742(64)# 0.0() 173.054(5) g 149 148.96404(54)# 150 149.95842(43)# 151 150.95540(32) 152 151.95029(22) 153 152.94948(21)# 154 153.946394(19) 155 154.945782(18) 156 155.942818(12) 157 156.942628(11) 158 157.939866(9) 159 158.940050(20) 160 159.937552(18) 161 160.937902(17) 162 161.935768(17) 163 162.936334(17) 164 163.934489(17) 165 164.935280(30) 166 165.933882(9) 167 166.934950(5) 168 167.933897(5) 0.0013(1) 169 168.935190(5) 170 169.9347618(26) 0.0304(15) 171 170.9363258(26) 0.1428(57) 172 171.9363815(26) 0.2183(67) 173 172.9382108(26) 0.1613(27) 174 173.9388621(26) 0.3183(92) 175 174.9412765(26) 176 175.9425717(28) 0.1276(41) 177 176.9452608(28) 178 177.946647(11) 179 178.95017(32)# 180 179.95233(43)# 181 180.95615(43)# _________________________________________________________________________ 71 Lu 150 149.97323(54)# 0.0() 174.9668(1) g 151 150.96758(43)# 152 151.96412(21)# 153 152.95877(22) 154 153.95752(22)# 155 154.954316(22) 156 155.953030(80) 157 156.950098(20) 158 157.949313(16) 159 158.946630(40) 160 159.946030(60) 161 160.943570(30) 162 161.943280(80) 163 162.941180(30) 164 163.941340(30) 165 164.939407(28) 166 165.939860(30) 167 166.938270(30) 168 167.938740(50) 169 168.937651(6) 170 169.938475(18) 171 170.9379131(30) 172 171.939086(3) 173 172.9389306(26) 174 173.9403375(26) 175 174.9407718(23) 0.9741(2) 176 175.9426863(23) 0.0259(2) 177 176.9437581(23) 178 177.945955(3) 179 178.947327(6) 180 179.949880(80) 181 180.95197(32)# 182 181.95504(21)# 183 182.95757(32)# 184 183.96091(43)# _________________________________________________________________________ 72 Hf 153 152.97069(54)# 0.0() 178.49(2) f 154 153.96486(54)# 155 154.96339(43)# 156 155.95936(22) 157 156.95840(21)# 158 157.954799(19) 159 158.953995(18) 160 159.950684(12) 161 160.950275(24) 162 161.947210(10) 163 162.947090(30) 164 163.944367(22) 165 164.944570(30) 166 165.942180(30) 167 166.942600(30) 168 167.940570(30) 169 168.941260(30) 170 169.939610(30) 171 170.940490(30) 172 171.939448(26) 173 172.940510(30) 174 173.940046(3) 0.0016(1) 175 174.941509(3) 176 175.9414086(24) 0.0526(7) 177 176.9432207(23) 0.1860(9) 178 177.9436988(23) 0.2728(7) 179 178.9458161(23) 0.1362(2) 180 179.9465500(23) 0.3508(16) 181 180.9491012(23) 182 181.950554(7) 183 182.953530(30) 184 183.955450(40) 185 184.95882(21)# 186 185.96089(32)# 187 186.96459(43)# 188 187.96685(54)# _________________________________________________________________________ 73 Ta 155 154.97459(54)# 0.0() 180.94788(2) 156 155.97230(43)# 157 156.96819(22) 158 157.96670(22)# 159 158.963018(22) 160 159.96149(10) 161 160.958420(60)# 162 161.957290(60) 163 162.954330(40) 164 163.953530(30) 165 164.950773(19) 166 165.950510(30) 167 166.948090(30) 168 167.948050(30) 169 168.946010(30) 170 169.946180(30) 171 170.944480(30) 172 171.944900(30) 173 172.943750(30) 174 173.944450(30) 175 174.943740(30) 176 175.944860(30) 177 176.944472(4) 178 177.945778(16) 179 178.9459295(23) 180 179.9474648(24) 0.00012(2) 181 180.9479958(19) 0.99988(2) 182 181.9501518(19) 183 182.9513726(19) 184 183.954008(28) 185 184.955559(15) 186 185.958550(60) 187 186.96053(21)# 188 187.96370(21)# 189 188.96583(32)# 190 189.96923(43)# _________________________________________________________________________ 74 W 158 157.97456(54)# 0.0() 183.84(1) 159 158.97292(43)# 160 159.96848(22) 161 160.96736(21)# 162 161.963497(19) 163 162.962520(60) 164 163.958954(13) 165 164.958280(27) 166 165.955027(11) 167 166.954816(21) 168 167.951808(17) 169 168.951779(17) 170 169.949228(16) 171 170.949450(30) 172 171.947290(30) 173 172.947690(30) 174 173.946080(30) 175 174.946720(30) 176 175.945630(30) 177 176.946640(30) 178 177.945876(16) 179 178.947070(17) 180 179.946704(4) 0.0012(1) 181 180.948197(5) 182 181.9482042(9) 0.2650(16) 183 182.9502230(9) 0.1431(4) 184 183.9509312(9) 0.3064(2) 185 184.9534193(10) 186 185.9543641(19) 0.2843(19) 187 186.9571605(19) 188 187.958489(4) 189 188.96191(21) 190 189.96318(18) 191 190.96660(21)# 192 191.96817(64)# _________________________________________________________________________ 75 Re 160 159.98212(43)# 0.0() 186.207(1) 161 160.97759(22) 162 161.97600(22)# 163 162.972081(21) 164 163.97032(17)# 165 164.967089(30) 166 165.965810(90)# 167 166.962600(60)# 168 167.961570(30) 169 168.958790(30) 170 169.958220(28) 171 170.955720(30) 172 171.955420(60) 173 172.953240(30) 174 173.953120(30) 175 174.951380(30) 176 175.951620(30) 177 176.950330(30) 178 177.950990(30) 179 178.949988(26) 180 179.950789(23) 181 180.950068(14) 182 181.95121(11) 183 182.950820(9) 184 183.952521(5) 185 184.9529550(13) 0.3740(2) 186 185.9549861(13) 187 186.9557531(15) 0.6260(2) 188 187.9581144(15) 189 188.959229(9) 190 189.96182(16) 191 190.963125(11) 192 191.96596(21)# 193 192.96747(21)# 194 193.97042(32)# _________________________________________________________________________ 76 Os 162 161.98443(54)# 0.0() 190.23(3) g,f 163 162.98269(43)# 164 163.97804(22) 165 164.97676(22)# 166 165.972691(20) 167 166.971550(80) 168 167.967804(13) 169 168.967019(27) 170 169.963577(12) 171 170.963185(20) 172 171.960023(16) 173 172.959808(16) 174 173.957062(12) 175 174.956946(15) 176 175.954810(30) 177 176.954965(17) 178 177.953251(18) 179 178.953816(19) 180 179.952379(22) 181 180.953240(30) 182 181.952110(23) 183 182.953130(50) 184 183.9524891(14) 0.0002(1) 185 184.9540423(14) 186 185.9538382(15) 0.0159(3) 187 186.9557505(15) 0.0196(2) 188 187.9558382(15) 0.1324(8) 189 188.9581475(16) 0.1615(5) 190 189.9584470(16) 0.2626(2) 191 190.9609297(16) 192 191.9614807(27) 0.4078(19) 193 192.9641516(27) 194 193.9651821(28) 195 194.96813(54) 196 195.969640(40) _________________________________________________________________________ 77 Ir 164 163.99220(44)# 0.0() 192.217(3) 165 164.98752(23)# 166 165.98582(22)# 167 166.981665(20) 168 167.97988(16)# 169 168.976295(28) 170 169.97497(11)# 171 170.971630(40) 172 171.97046(11)# 173 172.967502(15) 174 173.966861(30) 175 174.964113(21) 176 175.963649(22) 177 176.961302(21) 178 177.961082(21) 179 178.959122(12) 180 179.959229(23) 181 180.957625(28) 182 181.958076(23) 183 182.956846(27) 184 183.957480(30) 185 184.956700(30) 186 185.957946(18) 187 186.957363(7) 188 187.958853(8) 189 188.958719(14) 190 189.9605460(18) 191 190.9605940(18) 0.373(2) 192 191.9626050(18) 193 192.9629264(18) 0.627(2) 194 193.9650784(18) 195 194.9659796(18) 196 195.968400(40) 197 196.969653(22) 198 197.97228(21)# 199 198.973800(40) _________________________________________________________________________ 78 Pt 166 165.99486(54)# 0.0() 195.084(9) 167 166.99298(44)# 168 167.98815(22) 169 168.98672(22)# 170 169.982495(20) 171 170.981240(90) 172 171.977347(14) 173 172.976440(60) 174 173.972819(13) 175 174.972421(20) 176 175.968945(15) 177 176.968469(16) 178 177.965649(12) 179 178.965363(10) 180 179.963031(12) 181 180.963097(16) 182 181.961171(17) 183 182.961597(17) 184 183.959922(19) 185 184.960620(40) 186 185.959351(23) 187 186.960590(30) 188 187.959395(6) 189 188.960834(12) 190 189.959932(6) 0.00014(1) 191 190.961677(5) 192 191.9610380(27) 0.00782(7) 193 192.9629874(18) 194 193.9626803(9) 0.32967(99) 195 194.9647911(9) 0.33832(10) 196 195.9649515(9) 0.25242(41) 197 196.9673402(9) 198 197.967893(3) 0.07163(55) 199 198.970593(3) 200 199.971441(22) 201 200.974510(50) 202 201.97574(32)# _________________________________________________________________________ 79 Au 169 168.99808(32)# 0.0() 196.966569(4) 170 169.99612(22)# 171 170.991879(28) 172 171.99004(17)# 173 172.986237(28) 174 173.98476(11)# 175 174.981270(50) 176 175.98010(11)# 177 176.976865(14) 178 177.976030(60) 179 178.973213(18) 180 179.972521(23) 181 180.970079(21) 182 181.969618(22) 183 182.967593(11) 184 183.967452(24) 185 184.965789(28) 186 185.965953(23) 187 186.964568(27) 188 187.965324(22) 189 188.963948(22) 190 189.964700(17) 191 190.963700(40) 192 191.964813(17) 193 192.964150(11) 194 193.965365(11) 195 194.9650346(14) 196 195.966570(3) 197 196.9665687(6) 1.0000() 198 197.9682423(6) 199 198.9687652(6) 200 199.970730(50) 201 200.971657(3) 202 201.97381(18) 203 202.975155(3) 204 203.97772(22)# 205 204.97987(32)# _________________________________________________________________________ 80 Hg 171 171.00376(32)# 0.0() 200.59(2) 172 171.99883(22) 173 172.99724(22)# 174 173.992864(21) 175 174.99142(11) 176 175.987355(15) 177 176.986280(80) 178 177.982483(14) 179 178.981834(29) 180 179.978266(15) 181 180.977819(17) 182 181.974690(10) 183 182.974450(9) 184 183.971713(11) 185 184.971899(17) 186 185.969362(12) 187 186.969814(15) 188 187.967577(12) 189 188.968190(40) 190 189.966322(17) 191 190.967157(24) 192 191.965634(17) 193 192.966665(17) 194 193.965439(13) 195 194.966720(25) 196 195.965833(3) 0.0015(1) 197 196.967213(3) 198 197.9667690(4) 0.0997(20) 199 198.9682799(4) 0.1687(22) 200 199.9683260(4) 0.2310(19) 201 200.9703023(6) 0.1318(9) 202 201.9706430(6) 0.2986(26) 203 202.9728725(18) 204 203.9734939(4) 0.0687(15) 205 204.976073(4) 206 205.977514(22) 207 206.98259(16) 208 207.98594(32)# 209 208.99104(21)# 210 209.99451(32)# _________________________________________________________________________ 81 Tl 176 176.00059(21)# 0.0() 204.3833(2) 177 176.996427(27) 178 177.99490(12)# 179 178.991090(50) 180 179.98991(13)# 181 180.986257(10) 182 181.985670(80) 183 182.982193(10) 184 183.981870(50) 185 184.978790(60) 186 185.97833(20) 187 186.975906(9) 188 187.976010(40) 189 188.973588(12) 190 189.973880(50) 191 190.971786(8) 192 191.972230(30) 193 192.97067(12) 194 193.97120(15) 195 194.969774(15) 196 195.970481(13) 197 196.969575(18) 198 197.970480(90) 199 198.969880(30) 200 199.970963(6) 201 200.970819(16) 202 201.972106(16) 203 202.9723442(14) 0.2952(1) 204 203.9738635(13) 205 204.9744275(14) 0.7048(1) 206 205.9761103(15) 207 206.977419(6) 208 207.9820187(21) 209 208.985359(8) 210 209.990074(12) 211 210.99348(22)# 212 211.99823(32)# _________________________________________________________________________ 82 Pb 178 178.003830(26) 0.0() 207.2(1) g,r,f 179 179.00215(21)# 180 179.997918(22) 181 180.99662(10) 182 181.992672(15) 183 182.991870(30) 184 183.988142(15) 185 184.987610(17) 186 185.984239(12) 187 186.983918(9) 188 187.980874(11) 189 188.980810(40) 190 189.978082(13) 191 190.978270(40) 192 191.975785(14) 193 192.976170(50) 194 193.974012(19) 195 194.974542(25) 196 195.972774(15) 197 196.973431(6) 198 197.972034(16) 199 198.972917(28) 200 199.971827(12) 201 200.972885(24) 202 201.972159(9) 203 202.973391(7) 204 203.9730436(13) 0.014(1) 205 204.9744818(13) 206 205.9744653(13) 0.241(1) 207 206.9758969(13) 0.221(1) 208 207.9766521(13) 0.524(1) 209 208.9810901(19) 210 209.9841885(16) 211 210.9887370(29) 212 211.9918975(24) 213 212.996581(8) 214 213.9998054(26) 215 215.00481(44)# _________________________________________________________________________ 83 Bi 184 184.00112(14)# 0.0() 208.98040(1) 185 184.997630(60)# 186 185.996600(80) 187 186.993158(16) 188 187.992270(50) 189 188.989200(60) 190 189.98830(20) 191 190.985786(8) 192 191.985460(40) 193 192.982960(10) 194 193.982830(50) 195 194.980651(6) 196 195.980667(26) 197 196.978864(9) 198 197.979210(30) 199 198.977672(13) 200 199.978132(26) 201 200.977009(16) 202 201.977742(22) 203 202.976876(23) 204 203.977813(28) 205 204.977389(8) 206 205.978499(8) 207 206.9784707(26) 208 207.9797422(25) 209 208.9803987(16) 1.0000() 210 209.9841204(16) 211 210.987269(6) 212 211.9912857(21) 213 212.994385(5) 214 213.998712(12) 215 215.001770(16) 216 216.006306(12) 217 217.00947(21)# 218 218.01432(39)# _________________________________________________________________________ 84 Po 188 187.999422(21) 0.0() [209] 189 188.998481(24) 190 189.995101(14) 191 190.994574(12) 192 191.991335(13) 193 192.991030(40) 194 193.988186(13) 195 194.988110(40) 196 195.985535(14) 197 196.985660(50) 198 197.983389(19) 199 198.983666(25) 200 199.981799(15) 201 200.982260(6) 202 201.980758(16) 203 202.981420(28) 204 203.980318(12) 205 204.981203(21) 206 205.980481(9) 207 206.981593(7) 208 207.9812457(19) 209 208.9824304(20) 210 209.9828737(13) 211 210.9866532(14) 212 211.9888680(13) 213 212.992857(3) 214 213.9952014(16) 215 214.9994200(27) 216 216.0019150(24) 217 217.006335(7) 218 218.0089730(26) 219 219.01374(39)# 220 220.01660(39)# _________________________________________________________________________ 85 At 193 192.999840(60) 0.0() [210] 194 193.99873(20) 195 194.996268(10) 196 195.995790(60) 197 196.993190(50) 198 197.992840(50) 199 198.990530(50) 200 199.990351(26) 201 200.988417(9) 202 201.988630(30) 203 202.986942(13) 204 203.987251(26) 205 204.986074(16) 206 205.986667(22) 207 206.985784(23) 208 207.986590(28) 209 208.986173(8) 210 209.987148(8) 211 210.9874963(30) 212 211.990745(8) 213 212.992937(5) 214 213.996372(5) 215 214.998653(7) 216 216.002423(4) 217 217.004719(5) 218 218.008694(12) 219 219.011162(4) 220 220.015410(60) 221 221.01805(21)# 222 222.02233(32)# 223 223.02519(43)# _________________________________________________________________________ 86 Rn 195 195.005440(50) 0.0() [222] 196 196.002115(16) 197 197.001580(70) 198 197.998679(14) 199 198.998370(70) 200 199.995699(14) 201 200.995630(80) 202 201.993263(19) 203 202.993387(25) 204 203.991429(16) 205 204.991720(50) 206 205.990214(16) 207 206.990734(28) 208 207.989642(12) 209 208.990415(21) 210 209.989696(9) 211 210.990601(7) 212 211.990704(3) 213 212.993883(6) 214 213.995363(10) 215 214.998745(8) 216 216.000274(8) 217 217.003928(5) 218 218.0056013(25) 219 219.0094802(27) 220 220.0113940(24) 221 221.015537(6) 222 222.0175777(25) 223 223.02179(32)# 224 224.02409(32)# 225 225.02844(32)# 226 226.03089(43)# 227 227.03541(45)# 228 228.03799(44)# _________________________________________________________________________ 87 Fr 199 199.007260(40) 0.0() [223] 200 200.006570(80) 201 201.003860(80) 202 202.003370(50) 203 203.000925(17) 204 204.000653(26) 205 204.998594(8) 206 205.998670(30) 207 206.996950(50) 208 207.997140(50) 209 208.995954(16) 210 209.996408(24) 211 210.995537(23) 212 211.996202(28) 213 212.996189(8) 214 213.998971(9) 215 215.000341(8) 216 216.003198(15) 217 217.004632(7) 218 218.007578(5) 219 219.009252(8) 220 220.012327(4) 221 221.014255(5) 222 222.017552(23) 223 223.0197359(26) 224 224.023250(50) 225 225.025570(30) 226 226.02939(11) 227 227.03184(11) 228 228.03573(22)# 229 229.038450(40) 230 230.04251(48)# 231 231.04544(50)# 232 232.04977(69)# _________________________________________________________________________ 88 Ra 202 202.009890(70) 0.0() [226] 203 203.009270(90) 204 204.006500(17) 205 205.006270(90) 206 206.003827(19) 207 207.003800(60) 208 208.001840(17) 209 209.001990(50) 210 210.000495(16) 211 211.000898(28) 212 211.999794(12) 213 213.000384(22) 214 214.000108(10) 215 215.002720(8) 216 216.003533(9) 217 217.006320(9) 218 218.007140(12) 219 219.010085(9) 220 220.011028(10) 221 221.013917(5) 222 222.015375(5) 223 223.0185022(27) 224 224.0202118(24) 225 225.023612(3) 226 226.0254098(25) 227 227.0291778(25) 228 228.0310703(26) 229 229.034958(20) 230 230.037056(13) 231 231.04122(32)# 232 232.04364(30)# 233 233.04806(50)# 234 234.05070(53)# _________________________________________________________________________ 89 Ac 206 206.014500(80) 0.0() [227] 207 207.011950(60) 208 208.011550(60) 209 209.009490(50) 210 210.009440(60) 211 211.007730(80) 212 212.007810(70) 213 213.006610(60) 214 214.006902(24) 215 215.006454(23) 216 216.008720(29) 217 217.009347(14) 218 218.011640(50) 219 219.012420(50) 220 220.014763(16) 221 221.015590(50) 222 222.017844(6) 223 223.019137(8) 224 224.021723(4) 225 225.023230(5) 226 226.026098(4) 227 227.0277521(26) 228 228.0310211(27) 229 229.033020(40) 230 230.03629(32) 231 231.03856(11) 232 232.04203(11) 233 233.04455(32)# 234 234.04842(43)# 235 235.05123(38)# 236 236.05530(54)# _________________________________________________________________________ 90 Th 209 209.01772(11) 0.0() 232.03806(2) g 210 210.015075(27) 211 211.014930(80) 212 212.012980(20) 213 213.013010(80) 214 214.011500(18) 215 215.011730(29) 216 216.011062(14) 217 217.013114(22) 218 218.013284(14) 219 219.015540(50) 220 220.015748(24) 221 221.018184(10) 222 222.018468(13) 223 223.020811(10) 224 224.021467(12) 225 225.023951(5) 226 226.024903(5) 227 227.0277041(27) 228 228.0287411(24) 229 229.031762(3) 230 230.0331338(19) 231 231.0363043(19) 232 232.0380553(21) 1.0000() 233 233.0415818(21) 234 234.043601(4) 235 235.047510(50) 236 236.04987(21)# 237 237.05389(39)# 238 238.05650(30)# _________________________________________________________________________ 91 Pa 212 212.023200(80) 0.0() 231.03588(2) 213 213.021110(80) 214 214.020920(80) 215 215.019190(90) 216 216.019110(80) 217 217.018320(60) 218 218.020042(26) 219 219.019880(60) 220 220.021880(60) 221 221.021880(60) 222 222.023740(80)# 223 223.023960(80) 224 224.025626(17) 225 225.026130(80) 226 226.027948(12) 227 227.028805(8) 228 228.031051(5) 229 229.0320968(30) 230 230.034541(4) 231 231.0358840(24) 1.0000() 232 232.038592(8) 233 233.0402473(23) 234 234.043308(5) 235 235.045440(50) 236 236.04868(21) 237 237.05115(11) 238 238.054500(60) 239 239.05726(21)# 240 240.06098(32)# _________________________________________________________________________ 92 U 217 217.024370(90) 0.0() 238.02891(3) g,m,c 218 218.023540(30) 219 219.024920(60) 220 220.02472(22)# 221 221.02640(11)# 222 222.02609(11)# 223 223.027740(80) 224 224.027605(27) 225 225.029391(12) 226 226.029339(14) 227 227.031156(18) 228 228.031374(16) 229 229.033506(6) 230 230.033940(5) 231 231.036294(3) 232 232.0371562(24) 233 233.0396352(29) 234 234.0409521(20) 0.000054(5) 235 235.0439299(20) 0.007204(6) 236 236.0455680(20) 237 237.0487302(20) 238 238.0507882(20) 0.992742(10) 239 239.0542933(21) 240 240.056592(6) 241 241.06033(32)# 242 242.06293(22)# _________________________________________________________________________ 93 Np 225 225.033910(80) 0.0() [237] 226 226.03515(10)# 227 227.034960(80) 228 228.03618(21)# 229 229.036260(90) 230 230.037830(60) 231 231.038250(50) 232 232.04011(11)# 233 233.040740(50) 234 234.042895(9) 235 235.0440633(21) 236 236.046570(50) 237 237.0481734(20) 238 238.0509464(20) 239 239.0529390(22) 240 240.056162(16) 241 241.058250(80) 242 242.06164(21) 243 243.064280(30)# 244 244.06785(32)# _________________________________________________________________________ 94 Pu 228 228.038740(30) 0.0() [244] 229 229.040150(60) 230 230.039650(16) 231 231.041101(28) 232 232.041187(19) 233 233.043000(50) 234 234.043317(7) 235 235.045286(22) 236 236.0460580(24) 237 237.0484097(24) 238 238.0495599(20) 239 239.0521634(20) 240 240.0538135(20) 241 241.0568515(20) 242 242.0587426(20) 243 243.062003(3) 244 244.064204(5) 245 245.067747(15) 246 246.070205(16) 247 247.07407(32)# _________________________________________________________________________ 95 Am 231 231.04556(32)# 0.0() [243] 232 232.04659(32)# 233 233.04635(11)# 234 234.04781(22)# 235 235.04795(13)# 236 236.04958(11)# 237 237.050000(60)# 238 238.051980(50) 239 239.0530245(26) 240 240.055300(15) 241 241.0568291(20) 242 242.0595492(20) 243 243.0613811(25) 244 244.0642848(22) 245 245.066452(4) 246 246.069775(20) 247 247.07209(11)# 248 248.07575(22)# 249 249.07848(32)# _________________________________________________________________________ 96 Cm 233 233.050770(80) 0.0() [247] 234 234.050160(20) 235 235.05143(22)# 236 236.05141(22)# 237 237.05290(22)# 238 238.053030(40) 239 239.05496(11)# 240 240.0555295(25) 241 241.0576530(23) 242 242.0588358(20) 243 243.0613891(22) 244 244.0627526(20) 245 245.0654912(22) 246 246.0672237(22) 247 247.070354(5) 248 248.072349(5) 249 249.075953(5) 250 250.078357(12) 251 251.082285(24) 252 252.08487(32)# _________________________________________________________________________ 97 Bk 235 235.05658(43)# 0.0() [247] 236 236.05733(43)# 237 237.05700(24)# 238 238.05828(31)# 239 239.05828(25)# 240 240.05976(16)# 241 241.06023(22)# 242 242.06198(22)# 243 243.063008(5) 244 244.065181(16) 245 245.0663616(25) 246 246.068670(60) 247 247.070307(6) 248 248.073090(80)# 249 249.0749867(28) 250 250.078317(4) 251 251.080760(12) 252 252.08431(22)# 253 253.08688(39)# 254 254.09060(32)# _________________________________________________________________________ 98 Cf 237 237.06207(54)# 0.0() [251] 238 238.06141(43)# 239 239.06242(23)# 240 240.06230(22)# 241 241.06373(27)# 242 242.063700(40) 243 243.06543(15)# 244 244.066001(3) 245 245.068049(3) 246 246.0688053(22) 247 247.071001(9) 248 248.072185(6) 249 249.0748535(24) 250 250.0764061(22) 251 251.079587(5) 252 252.081626(5) 253 253.085133(7) 254 254.087323(13) 255 255.09105(22)# 256 256.09344(32)# _________________________________________________________________________ 99 Es 240 240.06892(43)# 0.0() [252] 241 241.06854(24)# 242 242.06975(35)# 243 243.06955(25)# 244 244.07088(20)# 245 245.07132(22)# 246 246.07290(24)# 247 247.073660(30)# 248 248.075470(60)# 249 249.076410(30)# 250 250.07861(11)# 251 251.079992(7) 252 252.082980(50) 253 253.0848247(28) 254 254.088022(5) 255 255.090273(12) 256 256.09360(11)# 257 257.09598(44)# 258 258.09952(32)# _________________________________________________________________________ 100 Fm 242 242.07343(43)# [257] 243 243.07435(23)# 244 244.07408(30)# 245 245.07539(30)# 246 246.075300(40) 247 247.07685(15)# 248 248.077195(13) 249 249.07903(11)# 250 250.079521(13) 251 251.081575(9) 252 252.082467(6) 253 253.085185(4) 254 254.0868542(30) 255 255.089962(5) 256 256.091773(8) 257 257.095105(7) 258 258.09708(22)# 259 259.10060(30)# 260 260.10268(54)# _________________________________________________________________________ 101 Md 245 245.08083(35)# [258] 246 246.08189(35)# 247 247.08164(35)# 248 248.08282(26)# 249 249.08301(24)# 250 250.08442(32)# 251 251.08484(22)# 252 252.08656(21)# 253 253.08728(22)# 254 254.08966(11)# 255 255.091083(7) 256 256.094060(60) 257 257.095541(3) 258 258.098431(5) 259 259.10051(22)# 260 260.10365(34)# 261 261.10572(70)# 262 262.10887(63)# _________________________________________________________________________ 102 No 248 248.08660(32)# [259] 249 249.08783(37)# 250 250.08751(22)# 251 251.08901(19)# 252 252.088977(14) 253 253.09068(11)# 254 254.090955(19) 255 255.093241(11) 256 256.094283(8) 257 257.096877(23) 258 258.09821(22)# 259 259.10103(11)# 260 260.10264(22)# 261 261.10575(32)# 262 262.10730(48)# 263 263.11055(53)# 264 264.11235(69)# _________________________________________________________________________ 103 Lr 251 251.09436(32)# [262] 252 252.09537(27)# 253 253.09521(24)# 254 254.09645(36)# 255 255.09668(22)# 256 256.09863(24)# 257 257.09956(22)# 258 258.10181(11)# 259 259.102900(80)# 260 260.10550(12)# 261 261.10688(22)# 262 262.10963(22)# 263 263.11129(39)# 264 264.11404(47)# 265 265.11584(77)# 266 266.11931(70)# _________________________________________________________________________ 104 Rf 253 253.10069(49)# [265] 254 254.10018(31)# 255 255.10134(19)# 256 256.101166(26) 257 257.10299(11)# 258 258.10349(22)# 259 259.105640(80)# 260 260.10644(22)# 261 261.108770(30) 262 262.10993(30)# 263 263.11255(20)# 264 264.11399(48)# 265 265.11670(46)# 266 266.11796(58)# 267 267.12153(62)# 268 268.12364(76)# _________________________________________________________________________ 105 Db 255 255.10740(45)# [268] 256 256.10813(31)# 257 257.10772(24)# 258 258.10923(37)# 259 259.10961(23)# 260 260.11130(25)# 261 261.11206(25)# 262 262.11408(20)# 263 263.11499(18)# 264 264.11740(25)# 265 265.11860(30)# 266 266.12103(39)# 267 267.12238(50)# 268 268.12545(57)# 269 269.12746(83)# 270 270.13071(77)# _________________________________________________________________________ 106 Sg 258 258.11317(45)# [271] 259 259.11450(19)# 260 260.114420(40) 261 261.11612(14)# 262 262.11640(30)# 263 263.11832(13)# 264 264.11893(30)# 265 265.121110(60) 266 266.12207(31)# 267 267.12443(29)# 268 268.12561(58)# 269 269.12876(70)# 270 270.13033(66)# 271 271.13347(70)# 272 272.13516(82)# 273 273.13822(71)# _________________________________________________________________________ 107 Bh 260 260.12197(62)# [272] 261 261.12166(25)# 262 262.12289(37)# 263 263.12304(39)# 264 264.12460(30)# 265 265.12515(41)# 266 266.12694(22)# 267 267.12765(28)# 268 268.12976(41)# 269 269.13069(44)# 270 270.13362(50)# 271 271.13518(60)# 272 272.13803(65)# 273 273.13962(89)# 274 274.14244(84)# 275 275.14425(70)# _________________________________________________________________________ 108 Hs 263 263.12856(37)# [270] 264 264.128390(50) 265 265.13009(15)# 266 266.13010(31)# 267 267.13179(11)# 268 268.13216(44)# 269 269.13406(13)# 270 270.13465(31)# 271 271.13766(36)# 272 272.13905(62)# 273 273.14199(89)# 274 274.14313(70)# 275 275.14595(77)# 276 276.14721(89)# 277 277.14984(78)# _________________________________________________________________________ 109 Mt 265 265.13615(50)# [276] 266 266.13730(37)# 267 267.13731(58)# 268 268.13873(34)# 269 269.13906(59)# 270 270.14066(58)# 271 271.14114(61)# 272 272.14374(52)# 273 273.14491(55)# 274 274.14749(60)# 275 275.14865(64)# 276 276.15116(73)# 277 277.15242(95)# 278 278.15481(90)# 279 279.15619(77)# _________________________________________________________________________ 110 Ds 267 267.14434(39)# [281] 268 268.14380(54)# 269 269.14512(15)# 270 270.14472(31)# 271 271.14606(11)# 272 272.14632(70)# 273 273.14886(14)# 274 274.14949(53)# 275 275.15218(48)# 276 276.15303(65)# 277 277.15565(104)# 278 278.15647(73)# 279 279.15886(80)# 280 280.15980(91)# 281 281.16206(78)# _________________________________________________________________________ 111 Rg 272 272.15362(36)# [280] 273 273.15368(65)# 274 274.15571(66)# 275 275.15614(74)# 276 276.15849(67)# 277 277.15952(66)# 278 278.16160(68)# 279 279.16247(71)# 280 280.16447(80)# 281 281.16537(100)# 282 282.16749(95)# 283 283.16842(84)# _________________________________________________________________________ 112 Cn 277 277.16394(14)# [285] 278 278.16431(57)# 279 279.16655(53)# 280 280.16704(69)# 281 281.16929(106)# 282 282.16977(76)# 283 283.17179(83)# 284 284.17238(91)# 285 285.17411(78)# _________________________________________________________________________ 113 Uut 283 283.17645(78)# [284] 284 284.17808(86)# 285 285.17873(105)# 286 286.18048(101)# 287 287.18105(90)# _________________________________________________________________________ 114 Uuq 285 285.18370(111)# [289] 286 286.18386(83)# 287 287.18560(83)# 288 288.18569(91)# 289 289.18728(79)# _________________________________________________________________________ 115 Uup 287 287.19119(85)# [288] 288 288.19249(92)# 289 289.19272(110)# 290 290.19414(106)# 291 291.19438(95)# _________________________________________________________________________ 116 Uuh 289 289.19886(117)# [293] 290 290.19859(91)# 291 291.20001(91)# 292 292.19979(92)# 293 _________________________________________________________________________ 117 Uus 291 291.20656(95)# [292] 292 292.20755(101)# _________________________________________________________________________ 118 Uuo 293 293.21467(129)# [294] 294 _________________________________________________________________________ Developers and Contributors: J. S. Coursey, D. J. Schwab, J. J. Tsai, and R. A. Dragoset NIST Physical Measurement Laboratory The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate. The atomic weights data were published by M.E. Weiser1 and M. Berglund2 in Atomic Weights of the Elements 2007, and the isotopic compositions data were published by J.K. Böhlke3, J.R. de Laeter4, P. De Bièvre5, H. Hidaka6, H.S. Peiser7, K.J.R. Rosman8, and P.D.P. Taylor9 in Isotopic Compositions of the Elements, 2001. The relative atomic masses of the isotopes data were published by G. Audi10, A.H. Wapstra11, and C. Thibault12 in The 2003 Atomic Mass Evaluation. These data have been compiled from the above sources for the user's convenience and does not represent a critical evaluation by the NIST Physical Measurement Laboratory. M. E. Wieser : Department of Physics and Astronomy, University of Calgary, Canada M. Berglund : European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (IRMM), Belgium J.K. Böhlke : United States Geological Survey, Reston, Virginia, USA J.R. de Laeter : Department of Applied Physics, Curtin University of Technology, Australia P. De Bièvre : Independent Consultant on Metrology in Chemistry, Belgium H. Hidaka : Department of Earth and Planetary Systems Science, Hiroshima University, Japan H. S. Peiser : United States Geological Survey, Reston, Virginia, USA K. J. R. Rosman : Department of Applied Physics, Curtin University of Technology, Australia P. D. P. Taylor : Institute for Reference Materials and Measurements, European Commission, Belgium G. Audi : Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay Campus, France A. H. Wapstra : National Institute of Nuclear Physics and High-Energy Physics, Amsterdam, The Netherlands C. Thibault : Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay Campus, France NOTES on COLUMNS ---------------- C. Thibault : Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay Campus, France Relative Atomic Mass (of the isotope): Ar(X), where X is an isotope [formerly called atomic weight (see Standard Atomic Weight)] These values are scaled to Ar(12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state. Thus, the relative atomic mass of entity X is given by: Ar(X) = m(X) / [m(12C) / 12] . If # is present, the value and error were derived not from purely experimental data, but at least partly from systematic trends. The 2003 Atomic Mass Evaluation does not extend beyond an atomic mass of 293. Representative Isotopic Composition: Mole fraction of the various isotopes In the opinion of the Subcommittee for Isotopic Abundance Measurements (SIAM), these values represent the isotopic composition of the chemicals and/or materials most commonly encountered in the laboratory. They may not, therefore, correspond to the most abundant natural material. The uncertainties listed in parenthesis cover the range of probable variations of the materials as well as experimental errors. These values are consistent with the values published in Atomic Weights of the Elements, 2001. Standard Atomic Weight (common usage): Ar(X), where X is an element [more appropriately called relative atomic mass of the element] The relative atomic mass of an element is derived by averaging the relative atomic masses of the isotopes of that element. These values are scaled to Ar(12C) = 12, where 12C is a neutral atom in its nuclear and electronic ground state. These values are dependent on the origin and treatment of the material. The uncertainties are listed in parenthesis. Brackets [ ] indicate the mass number of the most stable isotope. Notes: Notes for Representative Isotopic Composition and Standard Atomic Weight a Air reference material used for the best measurement. b Tank hydrogen has reported 2H mole fractions as low as 0.000032. c Materials depleted in 6Li and 235U are commercial sources of laboratory shelf reagents. In the case of Li, such samples are known to have 6Li mole fractions in the range of 0.02007 - 0.07672, with natural materials at the higher end of this range. In the case of U, the 235U mole fractions are reported to range from 0.0021 to 0.007207, far removed from the natural value. d The Commission on Atomic Weights and Isotopic Abundances recommends that the value of 272 be employed for 14N/15N of N2 in air for the calculation of 15N mole fractions from measured δ15N values. e The original data for Sn were adjusted to account for possible errors due to 115In contamination, and an error in the 114Sn abundance. f The abundance of this radiogenic isotope may vary substantially. g Geological specimens are known in which the element has an isotopic composition outside the limits for normal material. The difference between the atomic weight of the element in such specimens and that given in the table may exceed the stated uncertainty. h An electron multiplier was used for the Te measurements and the measured abundances were adjusted using a "square root of the masses" correction factor. i Commercially available Li materials have atomic weights that range between 6.939 and 6.996; if a more accurate value is required, it must be determined for the specific material. Note: The range given in Atomic Weights of the Elements 1995 was 6.94 to 6.99. m Modified isotopic compositions may be found in commercially available material because it has been subject to an undisclosed or inadvertent isotopic fractionation. Substantial deviations in the atomic weight and isotopic composition of the element from that given in the table can occur. r Range in isotopic composition of normal terrestrial material prevents a more precise value being given; the tabulated value should be applicable to any normal material. w Fresh water reference material used for the best measurement. Relative Isotopic Standard