Atomic number:	20		Atomic weight:	40.078
Shells:	2,8,8,2		Orbitals:	[Ar] 4s2
Melting point:	839°C		Boiling point:	1484°C
Covalent radius:	1.74	Å	Atomic volume:	25.9	cm³/mol
Atomic radius:	2.23	Å	Ionic radius:	1.00 (+2)	Å
Electronegativity:	1.00		Oxidation states:
1st ionization pot.:	6.1132	V	2nd ionization pot.:	11.871	V
3rd ionization pot.:	50.908	V	Specific heat:	0.63	J/gK
Heat of fusion:	8.540	kJ/mol	Heat of vapor.:	153.60	kJ/mol
Thermal conduct.:	2.00	W/cmK	Electrical conduct.:	0.298	10^6/cm ohm
Density:	1.55	g/cm³	Valence:	2