C
Carbon
Z 6 12.011 g/molOther Nonmetal
| 12C | 6 | 12.0 | 0.0 | 98.94% | Stable | 0+ | --- | 1919 |
| 13C | 7 | 13.0034 | 3,125.009 | 1.06% | Stable | 1/2- | --- | 1929 |
| 8C | 2 | 8.0376 | 35,064.0 | --- | 3.5 zs | 0+ | p→6Be(100%) | 1974 |
| 9C | 3 | 9.031 | 28,911.0 | --- | 126.5 ms | 3/2- | β⁺→9B(54.1%) β⁺α→5Li(38.4%) β⁺p→8Be(7.5%) | 1964 |
| 10C | 4 | 10.0169 | 15,698.67 | --- | 19.3 s | 0+ | β⁺→10B(100%) | 1949 |
| 11C | 5 | 11.0114 | 10,649.4 | --- | 20.34 m | 3/2- | β⁺→11B(100%) | 1934 |
| 14C | 8 | 14.0032 | 3,019.893 | --- | 5.7 ky | 0+ | β⁻→14N(100%) | 1936 |
| 15C | 9 | 15.0106 | 9,873.1 | --- | 2.45 s | 1/2+ | β⁻→15N(100%) | 1950 |
| 16C | 10 | 16.0147 | 13,694.0 | --- | 750.0 ms | 0+ | β⁻n→15N(99%) β⁻→16N(1%) | 1961 |
| 17C | 11 | 17.0226 | 21,032.0 | --- | 193.0 ms | 3/2+ | β⁻→17N(71.6%) β⁻n→16N(28.4%) β⁻n→15N | 1968 |
| 18C | 12 | 18.0268 | 24,920.0 | --- | 92.0 ms | 0+ | β⁻→18N(68.5%) β⁻n→17N(31.5%) β⁻n→16N | 1969 |
| 19C | 13 | 19.0348 | 32,410.0 | --- | 46.2 ms | 1/2+ | β⁻n→18N(47%) β⁻→19N(46%) β⁻n→17N(7%) | 1974 |
| 20C | 14 | 20.0403 | 37,500.0 | --- | 16.0 ms | 0+ | β⁻n→19N(70%) β⁻→20N(30%) β⁻n→18N(<18.6%) | 1981 |
| 21C | 15 | 21.049 | 45,640.0 | --- | --- | (1/2+) | n→20C | --- |
| 22C | 16 | 22.0576 | 53,610.0 | --- | 6.2 ms | 0+ | β⁻n→21N(61%) β⁻→22N(39%) β⁻n→20N(<37%) | 1986 |
| 23C | 17 | 23.0689 | 64,170.0 | --- | --- | (3/2+) | n→22C | --- |