in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 34 | Se | 74 | 73.922 4764(18) | 0.0089(4) | 78.96(3) | |||
| 76 | 75.919 2136(18) | 0.0937(29) | ||||||
| 77 | 76.919 9140(18) | 0.0763(16) | ||||||
| 78 | 77.917 3091(18) | 0.2377(28) | ||||||
| 80 | 79.916 5213(21) | 0.4961(41) | ||||||
| 82 | 81.916 6994(22) | 0.0873(22) | ||||||
| 82 | Pb | 204 | 203.973 0436(13) | 0.014(1) | 207.2(1) | g,r,f | ||
| 206 | 205.974 4653(13) | 0.241(1) | ||||||
| 207 | 206.975 8969(13) | 0.221(1) | ||||||
| 208 | 207.976 6521(13) | 0.524(1) | ||||||
| ||||||||
