Name :  Boron
Symbol :  B
Atomic Number :  5
Atomic Weight :  10.811
Specific Heat :  1.02 J/gK
Melting Point :  2079°C
Vaporization :  489.70 kJ/mol
Boiling Point :  4000°C
Electronegativity :  2.04
Density@293 K :  2.34 g/cm³
Discovered :  Sir H. Davy, J.L. Gay-Lussac, L.J. Thénard, England/France, 1808
Description :  Hard, brittle, lustrous black semimetal. Exists in the earth\'s crust at an average proportion of about 10 parts per million.
Uses :  Used with titanium & tungsten to make heat resistant alloys for jets & rockets.