Number of Isotopes: 1
Electron Affinity (kJ/mol): 91.3
First Ionization Energy (kJ/mol): 703.3
Second Ionization Energy (kJ/mol): 1610
Third Ionization Energy (kJ/mol): 2466
Electronegativity: 2.02
Polarizability (Å3): 7.4
Atomic Volume (cm3/mol): 21.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 150
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 117
Common Oxidation Numbers: +3
Other Oxid. Numbers: -3, +5