All Possible Isotopes
| No. | Element Symbol | Isotope(s) | Mass | Abundance(%) |
| 81 | Tl | 200Tl | 199.97095 | 0 |
| 201Tl | 200.97078 | 0 |
| 202Tl | 201.97209 | 0 |
| 203Tl | 202.97232 | 29.524 |
| 204Tl | 203.97385 | 0 |
| 205Tl | 204.974401 | 70.476 |
| 82 | Pb | 200Pb | 199.97182 | 0 |
| 201Pb | 200.97285 | 0 |
| 202Pb | 201.97214 | 0 |
| 203Pb | 202.97338 | 0 |
| 204Pb | 203.97302 | 1.4 |
| 205Pb | 204.97447 | 0 |
| 206Pb | 205.97444 | 24.1 |
| 207Pb | 206.975872 | 22.1 |
| 208Pb | 207.976627 | 52.4 |
| 210Pb | 209.98417 | 0 |
| 211Pb | 210.98873 | 0 |
| 212Pb | 211.99187 | 0 |
| 83 | Bi | 205Bi | 204.97737 | 0 |
| 206Bi | 205.97848 | 0 |
| 207Bi | 206.97846 | 0 |
| 208Bi | 207.97973 | 0 |
| 209Bi | 208.980374 | 100 |
| 210Bi | 209.9841 | 0 |
| 84 | Po | 206Po | 205.98047 | 0 |
| 207Po | 206.98158 | 0 |
| 208Po | 207.98123 | 0 |
| 209Po | 208.982404 | 100 |
| 210Po | 209.98286 | 0 |
| 85 | At | 207At | 206.98578 | 0 |
| 208At | 207.98657 | 0 |
| 209At | 208.98616 | 0 |
| 210At | 209.987126 | 100 |
| 211At | 210.98748 | 0 |
| 86 | Rn | 210Rn | 209.98968 | 0 |
| 211Rn | 210.99059 | 0 |
| 212Rn | 211.99069 | 0 |
| 213Rn | 212.99387 | 0 |
| 214Rn | 213.99535 | 0 |
| 215Rn | 214.99873 | 0 |
| 216Rn | 216.00026 | 0 |
| 217Rn | 217.00391 | 0 |
| 218Rn | 218.00559 | 0 |
| 219Rn | 219.00948 | 0 |
| 220Rn | 220.01138 | 0 |
| 221Rn | 221.0156 | 0 |
| 222Rn | 222.017571 | 100 |
| 87 | Fr | 210Fr | 209.9964 | 0 |
| 211Fr | 210.99553 | 0 |
| 212Fr | 211.99618 | 0 |
| 213Fr | 212.99617 | 0 |
| 214Fr | 213.99895 | 0 |
| 215Fr | 215.00033 | 0 |
| 216Fr | 216.00319 | 0 |
| 217Fr | 217.00462 | 0 |
| 218Fr | 218.00756 | 0 |
| 219Fr | 219.00924 | 0 |
| 220Fr | 220.01231 | 0 |
| 221Fr | 221.01425 | 0 |
| 222Fr | 222.01754 | 0 |
| 223Fr | 223.019733 | 100 |
| 224Fr | 224.02323 | 0 |
| 225Fr | 225.02561 | 0 |
| 226Fr | 226.0293 | 0 |
| 227Fr | 227.0318 | 0 |
| 88 | Ra | 223Ra | 223.018497 | 0 |
| 224Ra | 224.020202 | 0 |
| 225Ra | 225.023603 | 0 |
| 226Ra | 226.025403 | 100 |
| 227Ra | 227.02917 | 0 |
| 228Ra | 228.031063 | 0 |
| 89 | Ac | 224Ac | 224.021708 | 0 |
| 225Ac | 225.02322 | 0 |
| 226Ac | 226.026089 | 0 |
| 227Ac | 227.02775 | 100 |
| 228Ac | 228.031104 | 0 |
| 229Ac | 229.03293 | 0 |
| 90 | Th | 227Th | 227.027699 | 0 |
| 228Th | 228.028731 | 0 |
| 229Th | 229.031754 | 0 |
| 230Th | 230.033126 | 0 |
| 231Th | 231.036296 | 0 |
| 232Th | 232.0380508 | 100 |
| 233Th | 233.041576 | 0 |
| 234Th | 234.036596 | 0 |
| 91 | Pa | 228Pa | 228.031 | 0 |
| 229Pa | 229.03209 | 0 |
| 230Pa | 230.03453 | 0 |
| 231Pa | 231.03588 | 100 |
| 232Pa | 232.03858 | 0 |
| 233Pa | 233.04024 | 0 |
| 234Pa | 234.0433 | 0 |
| 92 | U | 230U | 230.03393 | 0 |
| 231U | 231.03626 | 0 |
| 232U | 232.03715 | 0 |
| 233U | 233.039628 | 0 |
| 234U | 234.0409468 | 0.0055 |
| 235U | 235.0439242 | 0.72 |
| 236U | 236.045561 | 0 |
| 237U | 237.048723 | 0 |
| 238U | 238.0507847 | 99.2745 |
| 93 | Np | 234Np | 234.04289 | 0 |
| 235Np | 235.04406 | 0 |
| 236Np | 236.04657 | 0 |
| 237Np | 237.0481678 | 100 |
| 238Np | 238.05094 | 0 |
| 239Np | 239.05293 | 0 |
| 94 | Pu | 236Pu | 236.04605 | 0 |
| 237Pu | 237.0484 | 0 |
| 238Pu | 238.04955 | 0 |
| 239Pu | 239.05216 | 0 |
| 240Pu | 240.05381 | 0 |
| 241Pu | 241.05684 | 0 |
| 242Pu | 242.05874 | 0 |
| 243Pu | 243.062 | 0 |
| 244Pu | 244.064199 | 100 |
| 245Pu | 245.06774 | 0 |
| 246Pu | 246.0702 | 0 |
| 95 | Am | 237Am | 237.0503 | 0 |
| 238Am | 238.05198 | 0 |
| 239Am | 239.05302 | 0 |
| 240Am | 240.05529 | 0 |
| 241Am | 241.05682 | 0 |
| 242Am | 242.05654 | 0 |
| 243Am | 243.061375 | 100 |
| 244Am | 244.06428 | 0 |
| 245Am | 245.06644 | 0 |
| 96 | Cm | 240Cm | 240.05552 | 0 |
| 241Cm | 241.05765 | 0 |
| 242Cm | 242.05883 | 0 |
| 243Cm | 243.06138 | 0 |
| 244Cm | 244.06275 | 0 |
| 245Cm | 245.06548 | 0 |
| 246Cm | 246.06722 | 0 |
| 247Cm | 247.070347 | 100 |
| 248Cm | 248.07234 | 0 |
| 249Cm | 249.07595 | 0 |
| 250Cm | 250.07835 | 0 |
| 97 | Bk | 245Bk | 245.06636 | 0 |
| 246Bk | 246.0687 | 0 |
| 247Bk | 247.0703 | 100 |
| 248Bk | 248.0731 | 0 |
| 249Bk | 249.07498 | 0 |
| 250Bk | 250.07831 | 0 |
| 98 | Cf | 248Cf | 248.07218 | 0 |
| 249Cf | 249.07485 | 0 |
| 250Cf | 250.0764 | 0 |
| 251Cf | 251.07958 | 100 |
| 252Cf | 252.08162 | 0 |
| 253Cf | 253.08513 | 0 |
| 254Cf | 254.08732 | 0 |
| 255Cf | 255.091 | 0 |
| 99 | Es | 249Es | 249.0764 | 0 |
| 250Es | 250.0787 | 0 |
| 251Es | 251.07998 | 0 |
| 252Es | 252.082944 | 100 |
| 253Es | 253.08482 | 0 |
| 254Es | 254.08802 | 0 |
| 255Es | 255.09027 | 0 |
| 100 | Fm | 251Fm | 251.08157 | 0 |
| 252Fm | 252.08246 | 0 |
| 253Fm | 253.08517 | 0 |
| 254Fm | 254.08685 | 0 |
| 255Fm | 255.08995 | 0 |
| 256Fm | 256.09177 | 0 |
| 257Fm | 257.095099 | 100 |
| 101 | Md | 255Md | 255.09108 | 0 |
| 256Md | 256.0941 | 0 |
| 257Md | 257.09553 | 0 |
| 258Md | 258.09857 | 100 |
| 259Md | 259.1005 | 0 |
| 260Md | 260.104 | 0 |
| 102 | No | 253No | 253.0907 | 0 |
| 254No | 254.0909 | 0 |
| 255No | 255.0932 | 0 |
| 256No | 256.0943 | 0 |
| 257No | 257.0968 | 0 |
| 258No | 258.0983 | 0 |
| 259No | 259.100931 | 100 |
| 103 | Lw | 255Lw | 255.0967 | 0 |
| 256Lw | 256.0988 | 0 |
| 257Lw | 257.0996 | 0 |
| 258Lw | 258.1019 | 0 |
| 259Lw | 259.103 | 0 |
| 260Lw | 260.10532 | 0 |
| 261Lw | 261.1069 | 0 |
| 262Lw | 262.11 | 100 |
