in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 1 | H | 1 | 1.007 825 032 23(9) | 0.999 885(70) | [1.007 84, 1.008 11] | m | ||
| D | 2 | 2.014 101 778 12(12) | 0.000 115(70) | |||||
| T | 3 | 3.016 049 2779(24) | ||||||
| 34 | Se | 74 | 73.922 475 934(15) | 0.0089(4) | 78.971(8) | r | ||
| 76 | 75.919 213 704(17) | 0.0937(29) | ||||||
| 77 | 76.919 914 154(67) | 0.0763(16) | ||||||
| 78 | 77.917 309 28(20) | 0.2377(28) | ||||||
| 80 | 79.916 5218(13) | 0.4961(41) | ||||||
| 82 | 81.916 6995(15) | 0.0873(22) | ||||||
| ||||||||
