Home 4 Be Beryllium back to the periodic table
 
Atomic number   4
Symbol   Be
Atomic weight   9.012182
Density [g/cm3]   1.85
Melting point [°C]   1278
Boiling point [°C]   2970
1st Ionization energy [eV]   9.322
Electronic configuration   [He] 2s2
Oxidation number (most stable)   2
Atomic radius [pm]   111.3 (a)
Ionic radius [pm]   35 (2+)
Abundance in crustal rocks [ppm]   2
Origin of the name   named after the mineral beryll
Discovery   1797 by the French chemist Louis Nicolas Vauquelin
Uses   as alloying additive für hardening copper and nickel, beryllium oxide due to its high melting point of 2530°C application in the field of ceramics and nuclear technology.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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