Atomic number:	63		Atomic weight:	151.965
Shells:	2,8,18,25,8,2		Orbitals:	[Xe] 4f7 6s2
Melting point:	822°C		Boiling point:	1527°C
Covalent radius:	1.85	Å	Atomic volume:	28.9	cm³/mol
Atomic radius:	2.56	Å	Ionic radius:	1.07 (+3)	Å
Electronegativity:	1.2		Oxidation states:	(3),2
1st ionization pot.:	5.6704	V	2nd ionization pot.:	11.245	V
3rd ionization pot.:	24.926	V	Specific heat:	0.18	J/gK
Heat of fusion:	9.210	kJ/mol	Heat of vapor.:	143.50	kJ/mol
Thermal conduct.:	0.139	W/cmK	Electrical conduct.:	0.0112	10^6/cm ohm
Density:	5.259	g/cm³	Valence:	2,3