in choosing which isotopes to search.
| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 8 | O | 16 | 15.994 914 6221(15) | 99.757(16) | 15.9994(3) | g,r | ||
| 17 | 16.999 131 50(22) | 0.038(1) | ||||||
| 18 | 17.999 160 4(9) | 0.205(14) | ||||||
| 26 | Fe | 54 | 53.939 6148(14) | 5.845(35) | 55.845(2) | |||
| 56 | 55.934 9421(15) | 91.754(36) | ||||||
| 57 | 56.935 3987(15) | 2.119(10) | ||||||
| 58 | 57.933 2805(15) | 0.282(4) | ||||||
| ||||||||
