Atomic number:	40		Atomic weight:	91.224
Shells:	2,8,18,10,2		Orbitals:	[Kr] 4d2 5s2
Melting point:	1852°C ±2°C		Boiling point:	4377°C
Covalent radius:	1.45	Å	Atomic volume:	14.1	cm³/mol
Atomic radius:	2.16	Å	Ionic radius:	.84 (+4)	Å
Electronegativity:	1.33		Oxidation states:
1st ionization pot.:	6.6339	V	2nd ionization pot.:	13.13	V
3rd ionization pot.:	22.99	V	Specific heat:	0.27	J/gK
Heat of fusion:	16.90	kJ/mol	Heat of vapor.:	58.20	kJ/mol
Thermal conduct.:	0.227	W/cmK	Electrical conduct.:	0.0236	10^6/cm ohm
Density:	6.4	g/cm³	Valence:	2,3,4