Number of Isotopes: 0
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 597
Second Ionization Energy (kJ/mol): Not applicable
Third Ionization Energy (kJ/mol): Not applicable
Electronegativity: 1.3
Polarizability (Å3): 24.8
Atomic Volume (cm3/mol): 11.6
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 155
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 124
Ionic Radius3+ (pm): 115
Common Oxidation Numbers: +5
Other Oxid. Numbers: +3, +4, +6, +7