Number of Isotopes: 1
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 564.7
Second Ionization Energy (kJ/mol): 1112
Third Ionization Energy (kJ/mol): 2114
Electronegativity: 1.21
Polarizability (Å3): 25.5
Atomic Volume (cm3/mol): 19.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 177
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 106.3
Common Oxidation Numbers: +3
Other Oxid. Numbers: +1, +4