Isotopic Abundance Mass (Accurate) Isotope Mass(amu) Composition (atomic % H1 1.007825 99.985 H2 2.0140 0.015 He3 3.01603 0.00014 He4 4.00260 99.99986 Lis 6.015121 7.5 Li7 7.016003 92.5 Be9 9.012182 100 B10 10.012937 19.8 B11 11.009305 80.2 c12 12.000000 98.90 C13 13.003355 1.10 N14 14.003074 99.63 N15 15.000108 0.37 016 15.994915 99.762 017 16.999131 0.038 018 17.999160 0.200 F19 18.998403 100 Ne20 19.992435 90.51 Ne21 20.993843 0.27 Ne22 21.991383 9.22 Na23 22.989767 100 Mg24 23.985042 78.99 Mg25 24.985837 10.00 Mg26 25.982593 11.01 A127 26.98154 100 Sj28 27.976927 92.23 S29 28.976495 4.67 S30 29.973770 3.10 p31 30.973762 100 S32 31.972070 95.02 s33 32.971456 0.75 S34 33.967866 4.21 s36 35.967080 0.02 CI35 34.968852 75.77 C37 36.965903 24.23 Ar36 35.967545 0.337
Isotopic Abundance & Mass (Accurate) Isotope Mass (amu) Composition (atomic %) H 1 1.007825 99.985 H 2 2.0140 0.015 He3 3.01603 0.00014 He4 4.00260 99.99986 Li6 6.015121 7.5 Li7 7.016003 92.5 Be9 9.012182 100 B 10 10.012937 19.8 B 11 11.009305 80.2 C 12 12.000000 98.90 C 13 13.003355 1.10 N 14 14.003074 99.63 N 15 15.000108 0.37 O 16 15.994915 99.762 O 17 16.999131 0.038 O 18 17.999160 0.200 F 19 18.998403 100 Ne20 19.992435 90.51 Ne21 20.993843 0.27 Ne22 21.991383 9.22 Na23 22.989767 100 Mg24 23.985042 78.99 Mg25 24.985837 10.00 Mg26 25.982593 11.01 Al27 26.98154 100 Si28 27.976927 92.23 Si29 28.976495 4.67 Si30 29.973770 3.10 P 31 30.973762 100 S 32 31.972070 95.02 S 33 32.971456 0.75 S 34 33.967866 4.21 S 36 35.967080 0.02 Cl35 34.968852 75.77 Cl37 36.965903 24.23 Ar36 35.967545 0.337
Ar38 37.962732 0.063 A40 39.962384 99.60 38.963707 93,2581 K40 39.963999 0.0117 K41 40.961825 6.7302 Ca40 39.962591 96.941 Ca42 41.958618 0.647 Ca43 42.958766 0.135 Ca44 43.955480 2.086 Ca46 45.953689 0.004 Ca48 47.952533 0.187 Sc45 44.955910 100 T46 45952629 8.0 T47 46.951764 7.3 T48 47.947947 73.8 T49 48.947871 5.5 T50 49.944792 54 V50 49.947161 0.25 51 50.943962 99.75 Cr50 49.946046 4.35 Cr52 51.940509 83.79 Cr53 52.940651 9.50 Cr54 53.938882 2.36 Mn55 54.938047 100 Fe54 53.939612 5.8 Fe56 55.934939 91.72 Fe57 56.935396 2.2 Fe58 57.933277 0.28 Co59 58.933198 100 Nis8 57935346 6827 N60 59.930788 26.10 N51 60.931058 1.13 N62 61.928346 359 N64 63927968 0.91 Cu63 62.939598 69.17 Cu65 64.927793 30.83 Zn64 63.929145 48.6 Zn56 65.926034 27.9 66.927129 4.1
Ar 3 8 37.962732 0.063 Ar4 0 39.962384 99.60 K 3 9 38.963707 93.2581 K 4 0 39.963999 0.0117 K 4 1 40.961825 6.7302 Ca 4 0 39.962591 96.941 Ca 4 2 41.958618 0.647 Ca 4 3 42.958766 0.135 Ca 4 4 43.955480 2.086 Ca 4 6 45.953689 0.004 Ca 4 8 47.952533 0.187 Sc 4 5 44.955910 100 Ti4 6 45.952629 8.0 Ti4 7 46.951764 7.3 Ti4 8 47.947947 73.8 Ti4 9 48.947871 5.5 Ti5 0 49.944792 5.4 V 5 0 49.947161 0.25 V 5 1 50.943962 99.75 Cr 5 0 49.946046 4.35 Cr 5 2 51.940509 83.79 Cr 5 3 52.940651 9.50 Cr 5 4 53.938882 2.36 Mn 5 5 54.938047 100 Fe 5 4 53.939612 5.8 Fe 5 6 55.934939 91.72 Fe 5 7 56.935396 2.2 Fe 5 8 57.933277 0.28 Co 5 9 58.933198 100 Ni 5 8 57.935346 68.27 Ni 6 0 59.930788 26.10 Ni 6 1 60.931058 1.13 Ni 6 2 61.928346 3.59 Ni 6 4 63.927968 0.91 Cu 6 3 62.939598 69.17 Cu 6 5 64.927793 30.83 Zn 6 4 63.929145 48.6 Zn 6 6 65.926034 27.9 Zn 6 7 66.927129 4.1
Zn68 67.924846 18.8 Zn70 69.925325 0.6 Ga69 68.925580 60.1 Ga71 70.924700 39.9 Ge70 69.924250 20.5 Ge72 71.922079 27.4 Ge73 72.923463 7.8 Ge74 73.921177 365 Ge76 75.921401 7.8 As75 74.921594 100 Se74 73.922475 0.9 Se76 75.919212 9.0 Se77 76.919912 7.6 Se78 77.917304 23.5 Se80 79.916520 49.6 Se82 81.916698 9.4 Br79 78.918336 50.69 Br81 80.916289 49.31 K78 77.920397 0.35 k50 79.916380 2.25 K2 81.913482 11.6 K83 82914135 11.5 K84 83911507 57.0 k86 85.910616 17.3 Rb85 84.911794 72.17 Rb87 86.909187 27.83 Sr84 83.913430 0.56 Sr86 85.909267 9.86 Sr87 86.908884 7.00 Sr88 87.905619 82.58 Y89 88.905849 100 z90 89.904703 51.45 Z91 90.905644 11.27 z92 91.,905039 17.17 Zr94 93.906314 17.33 Z96 95.908275 2.78 Nb93 92.906377 100 Mo92 91.906088 14.84 Mo94 93.905085 9.25
Zn 6 8 67.924846 18.8 Zn 7 0 69.925325 0.6 Ga 6 9 68.925580 60.1 Ga 7 1 70.924700 39.9 Ge 7 0 69.924250 20.5 Ge 7 2 71.922079 27.4 Ge 7 3 72.923463 7.8 Ge 7 4 73.921177 36.5 Ge 7 6 75.921401 7.8 As 7 5 74.921594 100 Se 7 4 73.922475 0.9 Se 7 6 75.919212 9.0 Se 7 7 76.919912 7.6 Se 7 8 77.917304 23.5 Se 8 0 79.916520 49.6 Se 8 2 81.916698 9.4 Br 7 9 78.918336 50.69 Br 8 1 80.916289 49.31 Kr 7 8 77.920397 0.35 Kr 8 0 79.916380 2.25 Kr 8 2 81.913482 11.6 Kr 8 3 82.914135 11.5 Kr 8 4 83.911507 57.0 Kr 8 6 85.910616 17.3 Rb 8 5 84.911794 72.17 Rb 8 7 86.909187 27.83 Sr 8 4 83.913430 0.56 Sr 8 6 85.909267 9.86 Sr 8 7 86.908884 7.00 Sr 8 8 87.905619 82.58 Y 8 9 88.905849 100 Zr 9 0 89.904703 51.45 Zr 9 1 90.905644 11.27 Zr 9 2 91.905039 17.17 Zr 9 4 93.906314 17.33 Zr 9 6 95.908275 2.78 Nb 9 3 92.906377 100 Mo 9 2 91.906088 14.84 Mo 9 4 93.905085 9.25
Mo95 94.905840 15.92 Mo96 95.904678 16.68 Mo97 96.906020 955 Mo98 97.905406 24.13 Mo100 99.907477 9.63 Tc Ru96 95.907599 5.52 Ru98 97.905287 1.88 Ru99 98.905939 12.7 Ru100 99.904219 12.6 Ru101 100.905582 17.0 Ru102 101.904348 31.6 Ru104 103.905424 18.7 Rh103 102.905500 100 Pa102 101.905634 1.02 Pd104 103.904029 11.14 Pd105 104.905079 22.33 Pd106 105.903478 27.33 Pd108 107.903895 26.46 Pa110 109905167 11.72 Ag107 106.905092 51.84 Ag109 108.904757 48.16 Cd106 105.906461 1.25 Cd108 107.904176 0.89 Cd110 109.903005 12.49 Cd111 110.904182 12.80 Cd112 111.902758 24.13 Cd113 112.904400 12.22 Cd114 113.903357 28.73 Cd116 115.904754 7.49 In113 112.904061 4.3 114.903880 95.7 Sn112 111.904826 1.0 Sn114 113.902784 0.7 Sn115 114.903348 0.4 Sn116 115.901747 14.7 Sn117 116.902956 7.7 Sn118 117.901609 24.3 Sn119 118.903310 8.6
Mo 9 5 94.905840 15.92 Mo 9 6 95.904678 16.68 Mo 9 7 96.906020 9.55 Mo 9 8 97.905406 24.13 Mo 1 0 0 99.907477 9.63 Tc - - Ru 9 6 95.907599 5.52 Ru 9 8 97.905287 1.88 Ru 9 9 98.905939 12.7 Ru 1 0 0 99.904219 12.6 Ru 1 0 1 100.905582 17.0 Ru 1 0 2 101.904348 31.6 Ru 1 0 4 103.905424 18.7 Rh 1 0 3 102.905500 100 Pd 1 0 2 101.905634 1.02 Pd 1 0 4 103.904029 11.14 Pd 1 0 5 104.905079 22.33 Pd 1 0 6 105.903478 27.33 Pd 1 0 8 107.903895 26.46 Pd 1 1 0 109.905167 11.72 Ag 1 0 7 106.905092 51.84 Ag 1 0 9 108.904757 48.16 Cd 1 0 6 105.906461 1.25 Cd 1 0 8 107.904176 0.89 Cd 1 1 0 109.903005 12.49 Cd 1 1 1 110.904182 12.80 Cd 1 1 2 1 11.902758 24.13 Cd 1 1 3 112.904400 12.22 Cd 1 1 4 113.903357 28.73 Cd 1 1 6 115.904754 7.49 In 1 1 3 112.904061 4.3 In 1 1 5 114.903880 95.7 Sn 1 1 2 1 11.904826 1.0 Sn 1 1 4 113.902784 0.7 Sn 1 1 5 114.903348 0.4 Sn 1 1 6 115.901747 14.7 Sn 1 1 7 116.902956 7.7 Sn 1 1 8 117.901609 24.3 Sn 1 1 9 118.903310 8.6
Sn120 119.902200 324 Sn122 121.903440 4.6 Sn124 123.905274 5.66 S6727 120.903821 57.3 5b123 122.904216 42.7 Te120 119.904048 0.096 Te122 121.903054 2.60 Te123 122.904271 0.908 7e124 123.902823 4.816 Te125 124.904433 7.14 Te126 125.903314 18.95 Te128 127.904463 31.69 Te130 129.906229 33.80 127 126.904473 100 Xe124 123.905894 0.10 Xe126 125.904281 0.09 Xe128 127.903531 1.91 Xe12g 128.904780 26.4 Xe130 129.903509 4.1 xe131 130.905072 21.2 Xe132 131.904144 26.9 Xe134 133905395 10.4 Xe136 135907214 8.9 Cs733 132.905429 100 Ba130 129.906282 0.106 Ba132 131905042 0.101 Ba134 133.904486 2.417 8a735 134.905665 6.592 Ba136 135.904553 7.854 Ba137 136.905812 11.23 Ba138 137.905232 71.70 La138 137.907105 0.09 La139 138.906346 99.91 ce136 135.907140 0.19 ce138 137.905985 0.25 Ce140 139.905433 88.48 ce142 141.909241 11.08 Pr141 140.907647 100 Nd142 141.907719 27.13
Sn 1 2 0 119.902200 32.4 Sn 1 2 2 121.903440 4.6 Sn 1 2 4 123.905274 5.66 Sb 1 2 1 120.903821 57.3 Sb 1 2 3 122.904216 42.7 Te 1 2 0 119.904048 0.096 Te 1 2 2 121.903054 2.60 Te 1 2 3 122.904271 0.908 Te 1 2 4 123.902823 4.816 Te 1 2 5 124.904433 7.14 Te 1 2 6 125.903314 18.95 Te 1 2 8 127.904463 31.69 Te 1 3 0 129.906229 33.80 I127 126.904473 100 Xe 1 2 4 123.905894 0.10 Xe 1 2 6 125.904281 0.09 Xe 1 2 8 127.903531 1.91 Xe 1 2 9 128.904780 26.4 Xe 1 3 0 129.903509 4.1 Xe 1 3 1 130.905072 21.2 Xe 1 3 2 131.904144 26.9 Xe 1 3 4 133.905395 10.4 Xe 1 3 6 135.907214 8.9 Cs 1 3 3 132.905429 100 Ba 1 3 0 129.906282 0.106 Ba 1 3 2 131.905042 0.101 Ba 1 3 4 133.904486 2.417 Ba 1 3 5 134.905665 6.592 Ba 1 3 6 135.904553 7.854 Ba 1 3 7 136.905812 11.23 Ba 1 3 8 137.905232 71.70 La 1 3 8 137.907105 0.09 La 1 3 9 138.906346 99.91 Ce 1 3 6 135.907140 0.19 Ce 1 3 8 137.905985 0.25 Ce 1 4 0 139.905433 88.48 Ce 1 4 2 141.909241 11.08 Pr 1 4 1 140.907647 100 Nd 1 4 2 141.907719 27.13
Nd143 142.909810 12.18 Nd144 143.910083 23.80 Na145 144.912570 8.30 Na146 145.913113 17.19 Nd148 147.916889 5.76 Nd150 149.920887 5.64 Pm Sm144 143.911998 3.1 Sm147 146.914895 15.0 Sm148 147.914820 1.3 sm149 148.917181 13.8 Sm150 149.917273 7.4 Sm152 151.919729 26.7 Sm154 153.922206 22.7 Eu151 150.919847 47.8 Eu153 152921225 52.2 Gd152 151.919786 0.20 Gd154 153.920861 2.18 Gd155 154.922618 14.80 Gd156 155.922118 20.47 Gd157 156.923956 15.65 Gd158 157.924099 24.84 Gd160 159.927049 21.86 Tb159 158925342 100 Dy156 155.925277 0.06 0y168 157.924403 0.10 Dy160 159.925193 2.34 Dy161 160.926930 18.9 Dy162 161.926795 25.5 Dy163 162.928728 24.9 Dy164 163.929171 28.2 Ho165 164.930319 100 Er162 161.928775 0.14 Er164 163.929198 1.61 Er166 165.930290 33.6 Er167 166.932046 22.95 Er168 167.932368 26.8 Er170 169.935461 14.9 Tm169 168.934212 100
Nd 1 4 3 142.909810 12.18 Nd 1 4 4 143.910083 23.80 Nd 1 4 5 144.912570 8.30 Nd 1 4 6 145.913113 17.19 Nd 1 4 8 147.916889 5.76 Nd 1 5 0 149.920887 5.64 Pm - - Sm 1 4 4 143.911998 3.1 Sm 1 4 7 146.914895 15.0 Sm 1 4 8 147.914820 11.3 Sm 1 4 9 148.917181 13.8 Sm 1 5 0 149.917273 7.4 Sm 1 5 2 151.919729 26.7 Sm 1 5 4 153.922206 22.7 Eu 1 5 1 150.919847 47.8 Eu 1 5 3 152.921225 52.2 Gd 1 5 2 151.919786 0.20 Gd 1 5 4 153.920861 2.18 Gd 1 5 5 154.922618 14.80 Gd 1 5 6 155.922118 20.47 Gd 1 5 7 156.923956 15.65 Gd 1 5 8 157.924099 24.84 Gd 1 6 0 159.927049 21.86 Tb 1 5 9 158.925342 100 Dy 1 5 6 155.925277 0.06 Dy 1 5 8 157.924403 0.10 Dy 1 6 0 159.925193 2.34 Dy 1 6 1 160.926930 18.9 Dy 1 6 2 161.926795 25.5 Dy 1 6 3 162.928728 24.9 Dy 1 6 4 163.929171 28.2 Ho 1 6 5 164.930319 100 Er 1 6 2 161.928775 0.14 Er 1 6 4 163.929198 1.61 Er 1 6 6 165.930290 33.6 Er 1 6 7 166.932046 22.95 Er 1 6 8 167.932368 26.8 Er 1 7 0 169.935461 14.9 Tm 1 6 9 168.934212 100
Yb168 167.933894 0.13 Yb170 169.934759 3.05 Yb171 170.936323 14.3 Yb172 171.936378 21.9 Yb173 172.938208 16.12 Yb174 173.938859 31.8 Yb176 175.942564 12.7 u175 174.940770 97.41 Lu176 175.942679 2.59 H174 173.940044 0.16 Hf176 175.941406 5.2 Hf77 176.943217 18.6 H178 177.943696 27.1 Hr179 178.945812 13.74 Hr180 179.946545 35.2 T7a180 179.947462 0.012 Ta181 180.947992 99.988 w180 179.946701 0.13 W182 181.948202 26.3 w183 182.950220 14.3 W184 183.950928 30.67 W186 185954357 28.6 Re185 184.952951 37.40 Re187 186.955744 62.6 0s184 183.952488 0.02 0s186 185953830 1.58 0s187 186.955741 1.6 0s188 187.955860 13.3 0s189 188.958137 16.1 0s190 189.958436 26.4 0s192 191.961467 41.0 r191 190.960584 37.3 r193 192.962917 62.7 P790 189.959917 0.01 PY192 191.961019 0.79 P194 193.962655 32.9 Pt195 194.964766 33.8 P196 195.964926 25.3 Pt198 197.967869 72
Yb 1 6 8 167.933894 0.13 Yb 1 7 0 169.934759 3.05 Yb 1 7 1 170.936323 14.3 Yb 1 7 2 171.936378 21.9 Yb 1 7 3 172.938208 16.12 Yb 1 7 4 173.938859 31.8 Yb 1 7 6 175.942564 12.7 Lu 1 7 5 174.940770 97.41 Lu 1 7 6 175.942679 2.59 Hf 1 7 4 173.940044 0.16 Hf 1 7 6 175.941406 5.2 Hf 1 7 7 176.943217 18.6 Hf 1 7 8 177.943696 27.1 Hf 1 7 9 178.945812 13.74 Hf 1 8 0 179.946545 35.2 Ta 1 8 0 179.947462 0.012 Ta 1 8 1 180.947992 99.988 W 1 8 0 179.946701 0.13 W 1 8 2 181.948202 26.3 W 1 8 3 182.950220 14.3 W 1 8 4 183.950928 30.67 W 1 8 6 185.954357 28.6 Re 1 8 5 184.952951 37.40 Re 1 8 7 186.955744 62.6 Os 1 8 4 183.952488 0.02 Os 1 8 6 185.953830 1.58 Os 1 8 7 186.955741 1.6 Os 1 8 8 187.955860 13.3 Os 1 8 9 188.958137 16.1 Os 1 9 0 189.958436 26.4 Os 1 9 2 191.961467 41.0 Ir 1 9 1 190.960584 37.3 Ir 1 9 3 192.962917 62.7 Pt 1 9 0 189.959917 0.01 Pt 1 9 2 191.961019 0.79 Pt 1 9 4 193.962655 32.9 Pt 1 9 5 194.964766 33.8 Pt 1 9 6 195.964926 25.3 Pt 1 9 8 197.967869 7.2
Au197 196.966543 100 Hg196 195.965807 0.15 Hg198 197.966743 10.1 Hg199 198.968254 17 Hg200 199.968300 23.1 Hg201 200.970277 13.2 Hg202 201.970617 29.65 Hg204 203.973467 6.8 T203 202.972320 29.524 Tn205 204.974401 70.476 Pb204 203.973020 1.4 Pb206 205.974440 24.1 Pb207 206.975872 22.1 Pb208 207.976627 52.4 Bi209 208.980374 100 Po At 、 Rn Fr Ra Ac 。 Th232 232.038054 100 Pa U234 234.040946 0.0055 U235 235.043924 0.720 U238 238.050784 99.2745 Data reprinted from CRC Handbook of Chemistry and Physics,69th ed.,1988-89. Boca Raton,Fl:CRC Press,Inc. De Blevre,P.Bames,IL: Intl.J.of Mass Spectrometry and lon Processes.1985;65:211-230
Au197 196.966543 100 Hg196 195.965807 0.15 Hg198 197.966743 10.1 Hg199 198.968254 17 Hg200 199.968300 23.1 Hg201 200.970277 13.2 Hg202 201.970617 29.65 Hg204 203.973467 6.8 Tl203 202.972320 29.524 Tl205 204.974401 70.476 Pb204 203.973020 1.4 Pb206 205.974440 24.1 Pb207 206.975872 22.1 Pb208 207.976627 52.4 Bi209 208.980374 100 Po - - At - - Rn - - Fr - - Ra - - Ac - - Th232 232.038054 100 Pa - - U 234 234.040946 0.0055 U 235 235.043924 0.720 U 238 238.050784 99.2745 Data reprinted from CRC Handbook of Chemistry and Physics, 69th ed., 1988-89. Boca Raton, Fl: CRC Press, Inc. & De Blevre, P, Barnes, IL: Intl. J. of Mass Spectrometry and Ion Processes. 1985; 65:211- 230