Atomic number:	83		Atomic weight:	208.98037
Shells:	2,8,18,32,18,5		Orbitals:	[Xe] 4f14 5d10 6s2 6p3
Melting point:	271.3°C		Boiling point:	1560°C ±5°C
Covalent radius:	1.46	Å	Atomic volume:	21.3	cm³/mol
Atomic radius:	1.63	Å	Ionic radius:	1.03 (+3)	Å
Electronegativity:	2.02		Oxidation states:	(3),5
1st ionization pot.:	7.289	V	2nd ionization pot.:	16.687	V
3rd ionization pot.:	25.559	V	Specific heat:	0.12	J/gK
Heat of fusion:	11.30	kJ/mol	Heat of vapor.:	104.80	kJ/mol
Thermal conduct.:	0.0787	W/cmK	Electrical conduct.:	0.00867	10^6/cm ohm
Density:	9.8	g/cm³	Valence:	3,5