Home 5 B Boron back to the periodic table
 
Atomic number   5
Symbol   B
Atomic weight   10.811
Density [g/cm3]   2.46
Melting point [°C]   2300
Boiling point [°C]   3660
1st Ionization energy [eV]   8.298
Electronic configuration   [He] 2s2 2p
Oxidation number (most stable)   3
Atomic radius [pm]   83
Ionic radius [pm]   23 (3+)
Abundance in crustal rocks [ppm]   9
Origin of the name   (lat.) boron
Discovery   Borax was known since ancient times, the element was first prepared by  H. Moissan in 1892
Uses   for the production of metal borides showing great hardness, compounds of boron are unsed as fluxes in the field of ceramics.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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