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) | ||||||
| 20 | Ca | 40 | 39.962 591 2(3) | 96.941(156) | 40.078(4) | g,r,f | ||
| 42 | 41.958 618 3(4) | 0.647(23) | ||||||
| 43 | 42.958 766 8(5) | 0.135(10) | ||||||
| 44 | 43.955 481 1(9) | 2.086(110) | ||||||
| 46 | 45.953 6928(25) | 0.004(3) | ||||||
| 48 | 47.952 534(4) | 0.187(21) | ||||||
| ||||||||
