Atomic number:	5		Atomic weight:	10.811
Shells:	2,3		Orbitals:	[He] 2s2 2p1
Melting point:	2079°C		Boiling point:	4000°C
Covalent radius:	0.82	Å	Atomic volume:	4.6	cm³/mol
Atomic radius:	1.17	Å	Ionic radius:	.23 (+3)	Å
Electronegativity:	2.04		Oxidation states:
1st ionization pot.:	8.2980	V	2nd ionization pot.:	25.154	V
3rd ionization pot.:	37.93	V	Specific heat:	1.02	J/gK
Heat of fusion:	50.20	kJ/mol	Heat of vapor.:	489.70	kJ/mol
Thermal conduct.:	0.270	W/cmK	Electrical conduct.:	1.0e-12	10^6/cm ohm
Density:	2.34	g/cm³	Valence:	3