Number of Isotopes: 7
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 529.6
Second Ionization Energy (kJ/mol): 1035
Third Ionization Energy (kJ/mol): 2130
Electronegativity: 1.14
Polarizability (Å3): 31.4
Atomic Volume (cm3/mol): 20.6
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 181
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 112.3
Common Oxidation Numbers: +3
Other Oxid. Numbers: +2