Atomic number:	19		Atomic weight:	39.0983
Shells:	2,8,8,1		Orbitals:	[Ar] 4s1
Melting point:	63.25°C		Boiling point:	759.9°C
Covalent radius:	2.03	Å	Atomic volume:	45.46	cm³/mol
Atomic radius:	2.77	Å	Ionic radius:	1.51 (+1)	Å
Electronegativity:	0.82		Oxidation states:
1st ionization pot.:	4.3407	V	2nd ionization pot.:	31.625	V
3rd ionization pot.:	45.72	V	Specific heat:	0.75	J/gK
Heat of fusion:	2.334	kJ/mol	Heat of vapor.:	79.870	kJ/mol
Thermal conduct.:	1.024	W/cmK	Electrical conduct.:	0.139	10^6/cm ohm
Density:	0.862	g/cm³	Valence:	1