Atomic number:	79		Atomic weight:	196.96654
Shells:	2,8,18,32,18,1		Orbitals:	[Xe] 4f14 5d10 6s1
Melting point:	1064.43°C		Boiling point:	2808°C
Covalent radius:	1.34	Å	Atomic volume:	10.2	cm³/mol
Atomic radius:	1.79	Å	Ionic radius:	.85 (+3)	Å
Electronegativity:	2.54		Oxidation states:	(3),1
1st ionization pot.:	9.2257	V	2nd ionization pot.:	20.521	V
3rd ionization pot.:	--	V	Specific heat:	0.128	J/gK
Heat of fusion:	12.550	kJ/mol	Heat of vapor.:	334.40	kJ/mol
Thermal conduct.:	3.17	W/cmK	Electrical conduct.:	0.452	10^6/cm ohm
Density:	19.32	g/cm³	Valence:	1,3