Number of Isotopes: 1
Electron Affinity (kJ/mol): 72.07
First Ionization Energy (kJ/mol): 1011.7
Second Ionization Energy (kJ/mol): 1903.2
Third Ionization Energy (kJ/mol): 2911.9
Electronegativity: 2.19
Polarizability (Å3): 3.6
Atomic Volume (cm3/mol): 17
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 110
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 58
Common Oxidation Numbers: -3, +3, +5
Other Oxid. Numbers: -2, -1, +1, +2, +4