Atomic number:	74		Atomic weight:	183.84
Shells:	2,8,18,32,12,2		Orbitals:	[Xe] 4f14 5d4 6s2
Melting point:	3410°C ±20°C		Boiling point:	5660°C
Covalent radius:	1.30	Å	Atomic volume:	9.53	cm³/mol
Atomic radius:	2.02	Å	Ionic radius:	.60 (+6)	Å
Electronegativity:	2.36		Oxidation states:	(6),5,4,3,2
1st ionization pot.:	7.98	V	2nd ionization pot.:	--	V
3rd ionization pot.:	--	V	Specific heat:	0.13	J/gK
Heat of fusion:	35.40	kJ/mol	Heat of vapor.:	824.0	kJ/mol
Thermal conduct.:	1.74	W/cmK	Electrical conduct.:	0.189	10^6/cm ohm
Density:	19.3	g/cm³	Valence:	2,3,4,5,6