Electronic data		Thermal data		Steric data
Shells: 2,3 Orbitals: [He] 2s2 2p1 Electronegativity: 2.0, 2.0 1. Ionization potential: 8.2980 eV 2. Ionization potential: 25.154 eV 3. Ionization potential: 37.93 eV Oxidation states: 3 Electrical conductivity: 1.0e-12 10^6		Melting point: 2079 °C Boiling point: 4000 °C Specific heat: 1.02 J/gK Heat of fusion: 50.20 kJ/mol Heat of vaporization: 489.70 kJ/mol Thermal conductivity: 0.270 W/cmK		Atomic radius: 1.17 Å Ionic radius: 0.23 Å () Covalent radius: 0.82 Å Atomic volume: 4.6 cm³/mol Density (293 K): 2.34 g/cm³ Crystal structure: Rhombohedral

Legend     Pocket calculator

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
10B	19.7	10.0129	3	--	stable	--
11B	80.3	11.0093	3/2	--	stable	--

Legend

Name origin:	From Arabic and Persian words for borax
Description:	Hard, brittle, lustrous black semimetal. Exists in the earth's crust at an average proportion of about 10 parts per million.
Discovered by:	Sir H. Davy, J.L. Gay-Lussac, L.J. Thénard
Year:	1808
Place:	England/France
Sources:	Obtained from kernite, a kind of borax (Na2B4O7.10H2O). High purity boron is produced by electrolysis of molten potassium fluroborate and potassium chloride (KCl).
Use(s):	Used with titanium & tungsten to make heat resistant alloys for jets & rockets.