CHEMICAL PROPERTIES – BORON SYMBOL, ELECTRONIC CONFIGURATION, DENSITY

Boron Description: Boron is a metalloid. Because boron is not produced by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth's crust. The major industrial scale uses of boron compounds are in sodium perborate bleaches, and the borax component of fiberglass insulation. Boron polymers and ceramics play specialized roles as high-strength lightweight structural and refractory materials. Boron compounds are used in silica-based glasses and ceramics to give them resistance to thermal shock. Boron-containing reagents are used for the synthesis of organic compounds, as intermediate in the synthesis of fine chemicals. A few boron-containing organic pharmaceuticals are used, or are in study. Boric acid is used as an insecticide, notably against ants, fleas, and cockroaches. Boron is a useful dopant for such semiconductors as silicon, germanium, and silicon carbide. Chemical Properties. Appearance Black-Brown Solid Atomic Number 5 Atomic Weight 10.811 g/mol Block p Boiling Point 3927 °C CAS Number 7440-42-8 Class 4.1 Density 2.08 g/cm3 EINECS Number 231-151-2 Electron Configuration 1s2 2s2 2p1 Group 13 Ionization Energy 800.6 kJ/mol Melting Point 2076 °C NFPA 704 H-1,F-1,R-0,C-NA Oxidation State 3,2,1 PG 3 Period 2 RTECS Number ED7350000 Symbol B Boron producers/suppliers - http://www.worldofchemicals.com/chemicals/manufacturers/fl/boron.html