It's Elemental
Isotopes of the Element Arsenic
Arsenic
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 |
| 75 | 100% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 60 | No Data Available | Proton Emission (suspected) | No Data Available |
| 61 | No Data Available | Proton Emission (suspected) | No Data Available |
| 62 | No Data Available | Proton Emission (suspected) | No Data Available |
| 63 | < 43 nanoseconds | Proton Emission | No Data Available |
| 64 | 18 milliseconds | Electron Capture | 100.00% |
| 65 | 128 milliseconds | Electron Capture | 100.00% |
| 66 | 95.77 milliseconds | Electron Capture | 100.00% |
| 67 | 42.5 seconds | Electron Capture | 100.00% |
| 68 | 151.6 seconds | Electron Capture | 100.00% |
| 69 | 15.2 minutes | Electron Capture | 100.00% |
| 70 | 52.6 minutes | Electron Capture | 100.00% |
| 71 | 65.30 hours | Electron Capture | 100.00% |
| 72 | 26.0 hours | Electron Capture | 100.00% |
| 73 | 80.30 days | Electron Capture | 100.00% |
| 74 | 17.77 days | Electron Capture | 66.00% |
| Beta-minus Decay | 34.00% | ||
| 75 | STABLE | - | - |
| 75m | 17.62 milliseconds | Isomeric Transition | 100.00% |
| 76 | 1.0942 days | Beta-minus Decay | 100.00% |
| 77 | 38.83 hours | Beta-minus Decay | 100.00% |
| 78 | 90.7 minutes | Beta-minus Decay | 100.00% |
| 79 | 9.01 minutes | Beta-minus Decay | 100.00% |
| 80 | 15.2 seconds | Beta-minus Decay | 100.00% |
| 81 | 33.3 seconds | Beta-minus Decay | 100.00% |
| 82 | 19.1 seconds | Beta-minus Decay | 100.00% |
| 82m | 13.6 seconds | Beta-minus Decay | 100.00% |
| 83 | 13.4 seconds | Beta-minus Decay | 100.00% |
| 84 | 4.2 seconds | Beta-minus Decay with delayed Neutron Emission | 0.18% |
| Beta-minus Decay | 100.00% | ||
| 85 | 2.021 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 59.40% | ||
| 86 | 0.945 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 26.00% | ||
| 87 | 0.56 seconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 15.40% | ||
| 88 | > 300 nanoseconds | Beta-minus Decay | 100.00% |
| 89 | > 300 nanoseconds | Beta-minus Decay (suspected) | No Data Available |
| 89m | 300 nanoseconds | Beta-minus Decay with delayed Neutron Emission (suspected) | No Data Available |
| 90 | > 300 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 91 | > 150 nanoseconds | Beta-minus Decay | No Data Available |
| 92 | No Data Available | Beta-minus Decay | 100.00% |
Citation and linking information
For questions about this page, please contact Steve Gagnon.