Most of the isotope data on this site has been obtained from the National Nuclear Data Center.
Naturally Occurring Isotopes
| Mass Number | Natural Abundance | Half-life |
| 28 | 92.223% | STABLE |
| 29 | 4.685% | STABLE |
| 30 | 3.092% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 22 | 29 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 32.00% | ||
| 23 | 42.3 milliseconds | Electron Capture with delayed Proton Emission | 71.00% |
| Electron Capture with delayed Double Proton Emission | 3.60% | ||
| Electron Capture | 100.00% | ||
| 24 | 140.5 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 45.00% | ||
| 25 | 220 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 35.00% | ||
| 26 | 2.229 seconds | Electron Capture | 100.00% |
| 27 | 4.15 seconds | Electron Capture | 100.00% |
| 28 | STABLE | - | - |
| 29 | STABLE | - | - |
| 30 | STABLE | - | - |
| 31 | 157.3 minutes | Beta-minus Decay | 100.00% |
| 32 | 153 years | Beta-minus Decay | 100.00% |
| 33 | 6.11 seconds | Beta-minus Decay | 100.00% |
| 34 | 2.77 seconds | Beta-minus Decay | 100.00% |
| 35 | 0.78 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | < 5.00% | ||
| 36 | 0.45 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | < 10.00% | ||
| 37 | 90 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 17.00% | ||
| 38 | > 1 microseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | No Data Available | ||
| 39 | 47.5 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 40 | 33.0 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 41 | 20.0 milliseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission (suspected) | No Data Available | ||
| 42 | 12.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 43 | > 60 nanoseconds | Beta-minus Decay with delayed Neutron Emission | No Data Available |
| Beta-minus Decay | No Data Available | ||
| 44 | > 360 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 45 | No Data Available | No Data Available | No Data Available |
This page is maintained by Steve Gagnon.