Atomic Number 5     Atomic Mass 10.811    Density 2.34 g/mL

State solid     Color black    Electronegativity 2.04

Melting Point 2070°C     Boiling Point 2550°C

Natural Isotopes B-10 19.9%   B-11 80.1%

Abbreviated Electron Configuration [He] 2s² 2p¹

Discovered by Sir Humphrey Davi, Gay-Lussac and Thenard in 1808.