| Isotope | Relative Atomic Mass |
Isotopic Composition |
Standard Atomic Weight |
Notes | ||||
|---|---|---|---|---|---|---|---|---|
 | ||||||||
| 20 | Ca | 40 | 39.962 590 863(22) | 0.969 41(156) | 40.078(4) | g | ||
| 42 | 41.958 617 83(16) | 0.006 47(23) | ||||||
| 43 | 42.958 766 44(24) | 0.001 35(10) | ||||||
| 44 | 43.955 481 56(35) | 0.020 86(110) | ||||||
| 46 | 45.953 6890(24) | 0.000 04(3) | ||||||
| 48 | 47.952 522 76(13) | 0.001 87(21) | ||||||
| ||||||||
