Atomic number:	73		Atomic weight:	180.9479
Shells:	2,8,18,32,11,2		Orbitals:	[Xe] 4f14 5d3 6s2
Melting point:	2996°C		Boiling point:	5425°C ±100°C
Covalent radius:	1.34	Å	Atomic volume:	10.90	cm³/mol
Atomic radius:	2.09	Å	Ionic radius:	.64 (+5)	Å
Electronegativity:	1.5		Oxidation states:
1st ionization pot.:	7.89	V	2nd ionization pot.:	--	V
3rd ionization pot.:	--	V	Specific heat:	0.14	J/gK
Heat of fusion:	31.60	kJ/mol	Heat of vapor.:	743.0	kJ/mol
Thermal conduct.:	0.575	W/cmK	Electrical conduct.:	0.0761	10^6/cm ohm
Density:	16.6	g/cm³	Valence:	3,5