Number of Isotopes: 2
Electron Affinity (kJ/mol): -6.75
First Ionization Energy (kJ/mol): 1402.3
Second Ionization Energy (kJ/mol): 2856
Third Ionization Energy (kJ/mol): 4578
Electronegativity: 3.04
Polarizability (Å3): 1.1
Atomic Volume (cm3/mol): 17.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 70
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 30
Common Oxidation Numbers: -3, +3, +5
Other Oxid. Numbers: -2, -1, +1, +2, +4