Atomic number:	71		Atomic weight:	174.967
Shells:	2,8,18,32,9,2		Orbitals:	[Xe] 4f14 5d1 6s2
Melting point:	1663°C		Boiling point:	3402°C
Covalent radius:	1.56	Å	Atomic volume:	17.78	cm³/mol
Atomic radius:	2.25	Å	Ionic radius:	.98 (+3)	Å
Electronegativity:	1.27		Oxidation states:
1st ionization pot.:	5.4259	V	2nd ionization pot.:	13.888	V
3rd ionization pot.:	20.957	V	Specific heat:	0.15	J/gK
Heat of fusion:	18.60	kJ/mol	Heat of vapor.:	355.90	kJ/mol
Thermal conduct.:	0.164	W/cmK	Electrical conduct.:	0.0185	10^6/cm ohm
Density:	9.85	g/cm³	Valence:	3