It's Elemental
Isotopes of the Element Magnesium
Magnesium
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 |
| 24 | 78.99% | STABLE |
| 25 | 10.00% | STABLE |
| 26 | 11.01% | STABLE |
Known Isotopes
| Mass Number | Half-life | Decay Mode | Branching Percentage |
| 19 | 4.0 picoseconds | Double Proton Emission | 100.00% |
| 20 | 90.8 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | ~ 27.00% | ||
| 21 | 122 milliseconds | Electron Capture | 100.00% |
| Electron Capture with delayed Proton Emission | 32.60% | ||
| Electron Capture with delayed Alpha Decay | < 0.50% | ||
| 22 | 3.8755 seconds | Electron Capture | 100.00% |
| 23 | 11.317 seconds | Electron Capture | 100.00% |
| 24 | STABLE | - | - |
| 25 | STABLE | - | - |
| 26 | STABLE | - | - |
| 27 | 9.458 minutes | Beta-minus Decay | 100.00% |
| 28 | 20.915 hours | Beta-minus Decay | 100.00% |
| 29 | 1.30 seconds | Beta-minus Decay | 100.00% |
| 30 | 335 milliseconds | Beta-minus Decay | 100.00% |
| 31 | 232 milliseconds | Beta-minus Decay with delayed Neutron Emission | 1.70% |
| Beta-minus Decay | 100.00% | ||
| 32 | 86 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 5.50% | ||
| 33 | 90.5 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 14.00% | ||
| 34 | 20 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 35 | 70 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | 52.00% | ||
| 36 | 3.9 milliseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 37 | > 260 nanoseconds | Beta-minus Decay | 100.00% |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 38 | > 260 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available | ||
| 39 | < 180 nanoseconds | Neutron Emission | No Data Available |
| 40 | > 170 nanoseconds | Beta-minus Decay | No Data Available |
| Beta-minus Decay with delayed Neutron Emission | No Data Available |
Citation and linking information
For questions about this page, please contact Carol McKisson.