It's Elemental
Isotopes of the Element Tellurium
Tellurium
Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information.
Isotopes With A Known Natural Abundance
| Mass Number | Natural Abundance | Half-life |
| 120 | 0.09% | STABLE |
| 122 | 2.55% | STABLE |
| 123 | 0.89% | > 9.2×10+16 years |
| 124 | 4.74% | STABLE |
| 125 | 7.07% | STABLE |
| 126 | 18.84% | STABLE |
| 128 | 31.74% | 2.41×10+24 years |
| 130 | 34.08% | >= 3.0×10+24 years |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 105 | 0.62 microseconds | Alpha Decay | 100.00% |
| 106 | 70 microseconds | Alpha Decay | 100.00% |
| 107 | 3.1 milliseconds | Alpha Decay | 70.00% |
| Electron Capture | 30.00% | ||
| 108 | 2.1 seconds | Alpha Decay | 49.00% |
| Electron Capture with delayed Proton Emission | 2.40% | ||
| Electron Capture | 51.00% | ||
| 109 | 4.6 seconds | Electron Capture | 96.10% |
| Electron Capture with delayed Proton Emission | 9.40% | ||
| Alpha Decay | 3.90% | ||
| Electron Capture with delayed Alpha Decay | < 5.0×10-3 % | ||
| 110 | 18.6 seconds | Electron Capture | 100.00% |
| Alpha Decay | ~ 3.0×10-3 % | ||
| 111 | 19.3 seconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | No Data Available | ||
| 112 | 2.0 minutes | Electron Capture | 100.00% |
| 113 | 1.7 minutes | Electron Capture | 100.00% |
| 114 | 15.2 minutes | Electron Capture | 100.00% |
| 115 | 5.8 minutes | Electron Capture | 100.00% |
| 115m | 6.7 minutes | Electron Capture | <= 100.00% |
| Isomeric Transition | No Data Available | ||
| 116 | 2.49 hours | Electron Capture | 100.00% |
| 117 | 62 minutes | Electron Capture | 100.00% |
| 117m | 103 milliseconds | Isomeric Transition | 100.00% |
| 118 | 6.00 days | Electron Capture | 100.00% |
| 119 | 16.05 hours | Electron Capture | 100.00% |
| 119m | 4.70 days | Electron Capture | 100.00% |
| Isomeric Transition | < 8.0×10-3 % | ||
| 120 | STABLE | - | - |
| 121 | 19.17 days | Electron Capture | 100.00% |
| 121m | 164.2 days | Isomeric Transition | 88.60% |
| Electron Capture | 11.40% | ||
| 122 | STABLE | - | - |
| 123 | > 9.2×10+16 years | Electron Capture | 100.00% |
| 123m | 119.2 days | Isomeric Transition | 100.00% |
| 124 | STABLE | - | - |
| 125 | STABLE | - | - |
| 125m | 57.40 days | Isomeric Transition | 100.00% |
| 126 | STABLE | - | - |
| 127 | 9.35 hours | Beta-minus Decay | 100.00% |
| 127m | 106.1 days | Isomeric Transition | 97.60% |
| Beta-minus Decay | 2.40% | ||
| 128 | 2.41×10+24 years | Double Beta-minus Decay | 100.00% |
| 129 | 69.6 minutes | Beta-minus Decay | 100.00% |
| 129m | 33.6 days | Isomeric Transition | 63.00% |
| Beta-minus Decay | 37.00% | ||
| 130 | >= 3.0×10+24 years | Double Beta-minus Decay | 100.00% |
| 131 | 25.0 minutes | Beta-minus Decay | 100.00% |
| 131m | 33.25 hours | Beta-minus Decay | 74.10% |
| Isomeric Transition | 25.90% | ||
| 131m1 | 93 milliseconds | Isomeric Transition | 100.00% |
| 132 | 3.204 days | Beta-minus Decay | 100.00% |
| 133 | 12.5 minutes | Beta-minus Decay | 100.00% |
| 133m | 55.4 minutes | Beta-minus Decay | 83.50% |
| Isomeric Transition | 16.50% | ||
| 134 | 41.8 minutes | Beta-minus Decay | 100.00% |
| 135 | 19.0 seconds | Beta-minus Decay | 100.00% |
| 136 | 17.63 seconds | Beta-minus Decay with delayed Neutron Emission | 1.31% |
| Beta-minus Decay | 100.00% | ||
| 137 | 2.49 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 2.99% | ||
| 138 | 1.4 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 6.30% | ||
| 139 | > 150 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 140 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 141 | > 150 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 141m | 150 nanoseconds | Beta-minus Decay with delayed Neutron Emission (suspected) | No Data Available |
| 142 | No Data Available | No Data Available | No Data Available |
| 143 | > 408 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| Beta-minus Decay with delayed Double Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.