Number of Isotopes: 1
Electron Affinity (kJ/mol): 109.7
First Ionization Energy (kJ/mol): 719.8
Second Ionization Energy (kJ/mol): 1744.4
Third Ionization Energy (kJ/mol): 2996.8
Electronegativity: 2.28
Polarizability (Å3): 8.6
Atomic Volume (cm3/mol): 8.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 134
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 80.5
Common Oxidation Numbers: +3
Other Oxid. Numbers: -1, +1, +2, +4, +5, +6