| Number of Isotopes: | 3 |
| Electron Affinity (kJ/mol): | 72.7711 |
| First Ionization Energy (kJ/mol): | 1312 |
| Second Ionization Energy (kJ/mol): | Not applicable |
| Third Ionization Energy (kJ/mol): | Not applicable |
| Electronegativity: | 2.2 |
| Polarizability (Å3): | 0.7 |
| Atomic Volume (cm3/mol): | 14.4 |
| Ionic Radius2- (pm): | No data |
| Ionic Radius1- (pm): | No data |
| Atomic Radius (pm): | 37.1 |
| Ionic Radius1+ (pm): | No data |
| Ionic Radius2+ (pm): | No data |
| Ionic Radius3+ (pm): | No data |
| Common Oxidation Numbers: | -1,+1 |
| Other Oxid. Numbers: |