Number of Isotopes: 1
Electron Affinity (kJ/mol): 86.2
First Ionization Energy (kJ/mol): 663.8
Second Ionization Energy (kJ/mol): 1381.7
Third Ionization Energy (kJ/mol): 2416
Electronegativity: 1.6
Polarizability (Å3): 15.7
Atomic Volume (cm3/mol): 10.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 146
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 86
Common Oxidation Numbers: +5
Other Oxid. Numbers: -1, +2, +3, +4