Atomic number:	80		Atomic weight:	200.59
Shells:	2,8,18,32,8,2		Orbitals:	[Xe] 4f14 5d10 6s2
Melting point:	-38.87°C		Boiling point:	356.58°C
Covalent radius:	1.49	Å	Atomic volume:	14.82	cm³/mol
Atomic radius:	1.76	Å	Ionic radius:	1.02 (+2)	Å
Electronegativity:	2.00		Oxidation states:	(2),1
1st ionization pot.:	10.4375	V	2nd ionization pot.:	18.759	V
3rd ionization pot.:	34.202	V	Specific heat:	0.139	J/gK
Heat of fusion:	2.295	kJ/mol	Heat of vapor.:	59.229	kJ/mol
Thermal conduct.:	0.0834	W/cmK	Electrical conduct.:	0.0104	10^6/cm ohm
Density:	13.546	g/cm³	Valence:	1,2