O
Oxygen
Z 8 15.999 g/molOther Nonmetal
| 16O | 8 | 15.9949 | -4,737.002 | 99.757% | Stable | 0+ | --- | 1919 |
| 18O | 10 | 17.9992 | -782.816 | 0.2045% | Stable | 0+ | --- | 1929 |
| 17O | 9 | 16.9991 | -808.764 | 0.0384% | Stable | 5/2+ | --- | 1925 |
| 11O | 3 | 11.0513 | 47,740.0 | --- | 198.0 ys | (3/2-) | p→9C(100%) | 2019 |
| 12O | 4 | 12.0344 | 32,013.0 | --- | 8.9 zs | 0+ | p→10C(100%) | 1978 |
| 13O | 5 | 13.0248 | 23,115.0 | --- | 8.58 ms | (3/2-) | β⁺→13N(89.1%) β⁺p→12C(10.9%) | 1963 |
| 14O | 6 | 14.0086 | 8,007.781 | --- | 1.18 m | 0+ | β⁺→14N(100%) | 1949 |
| 15O | 7 | 15.0031 | 2,855.6 | --- | 2.04 m | 1/2- | β⁺→15N(100%) | 1934 |
| 19O | 11 | 19.0036 | 3,332.9 | --- | 26.47 s | 5/2+ | β⁻→19F(100%) | 1936 |
| 20O | 12 | 20.0041 | 3,796.2 | --- | 13.51 s | 0+ | β⁻→20F(100%) | 1959 |
| 21O | 13 | 21.0087 | 8,062.0 | --- | 3.42 s | (5/2+) | β⁻→21F(100%) β⁻n→20F | 1968 |
| 22O | 14 | 22.01 | 9,280.0 | --- | 2.25 s | 0+ | β⁻→22F(100%) β⁻n→21F(<22%) | 1969 |
| 23O | 15 | 23.0157 | 14,620.0 | --- | 97.0 ms | 1/2+ | β⁻→23F(93%) β⁻n→22F(7%) | 1970 |
| 24O | 16 | 24.0199 | 18,500.0 | --- | 77.4 ms | 0+ | β⁻→24F(57%) β⁻n→23F(43%) | 1970 |
| 25O | 17 | 25.0293 | 27,330.0 | --- | 5.18 zs | (3/2+) | n→24O(100%) | 2008 |
| 26O | 18 | 26.0372 | 34,660.0 | --- | 4.2 ps | 0+ | n→24O(100%) | 2012 |
| 27O | 19 | 27.048 | 44,670.0 | --- | --- | (3/2+) | n→26O n→25O | --- |
| 28O | 20 | 28.0559 | 52,080.0 | --- | --- | 0+ | n→26O | --- |