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 |
| 102 | 1.02% | STABLE |
| 104 | 11.14% | STABLE |
| 105 | 22.33% | STABLE |
| 106 | 27.33% | STABLE |
| 108 | 26.46% | STABLE |
| 110 | 11.72% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 91 | 1 microseconds | Electron Capture (suspected) | No Data Available |
| 92 | 0.7 seconds | Electron Capture | 100.00% |
| 93 | 1.00 seconds | Electron Capture with delayed Proton Emission | No Data Available |
| Electron Capture | 100.00% | ||
| 94 | 9.6 seconds | Electron Capture | 100.00% |
| 95 | 5 seconds | Electron Capture | 100.00% |
| 95m | 13.3 seconds | Electron Capture | 89.00% |
| Isomeric Transition | 11.00% | ||
| Electron Capture with delayed Proton Emission | 0.93% | ||
| 96 | 122 seconds | Electron Capture | 100.00% |
| 97 | 3.10 minutes | Electron Capture | 100.00% |
| 98 | 17.7 minutes | Electron Capture | 100.00% |
| 99 | 21.4 minutes | Electron Capture | 100.00% |
| 100 | 3.63 days | Electron Capture | 100.00% |
| 101 | 8.47 hours | Electron Capture | 100.00% |
| 102 | STABLE | - | - |
| 103 | 16.991 days | Electron Capture | 100.00% |
| 104 | STABLE | - | - |
| 105 | STABLE | - | - |
| 106 | STABLE | - | - |
| 107 | 6.5×10+6 years | Beta-minus Decay | 100.00% |
| 107m | 21.3 seconds | Isomeric Transition | 100.00% |
| 108 | STABLE | - | - |
| 109 | 13.7012 hours | Beta-minus Decay | 100.00% |
| 109m | 4.696 minutes | Isomeric Transition | 100.00% |
| 110 | STABLE | - | - |
| 111 | 23.4 minutes | Beta-minus Decay | 100.00% |
| 111m | 5.5 hours | Isomeric Transition | 73.00% |
| Beta-minus Decay | 27.00% | ||
| 112 | 21.03 hours | Beta-minus Decay | 100.00% |
| 113 | 93 seconds | Beta-minus Decay | 100.00% |
| 113m | 0.3 seconds | Isomeric Transition | 100.00% |
| 114 | 2.42 minutes | Beta-minus Decay | 100.00% |
| 115 | 25 seconds | Beta-minus Decay | 100.00% |
| 115m | 50 seconds | Isomeric Transition | 8.00% |
| Beta-minus Decay | 92.00% | ||
| 116 | 11.8 seconds | Beta-minus Decay | 100.00% |
| 117 | 4.3 seconds | Beta-minus Decay | 100.00% |
| 118 | 1.9 seconds | Beta-minus Decay | 100.00% |
| 119 | 0.92 seconds | Beta-minus Decay | 100.00% |
| 120 | 0.5 seconds | Beta-minus Decay | 100.00% |
| 121 | 285 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | <= 0.80% | ||
| 122 | 175 milliseconds | Beta-minus Decay | >= 97.50% |
| Beta-minus Decay with delayed Neutron Emission | <= 2.50% | ||
| 123 | 174 milliseconds | Beta-minus Decay | No Data Available |
| 124 | 38 milliseconds | Beta-minus Decay | 100.00% |
| 125 | > 230 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 126 | > 230 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 128 | > 394 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
This page is maintained by Steve Gagnon.