Home 56 Ba Barium back to the periodic table
 
Atomic number   56
Symbol   Ba
Atomic weight   137.327
Density [g/cm3]   3.65
Melting point [°C]   725
Boiling point [°C]   1640
1st Ionization energy [eV]   5.212
Electronic configuration   [Xe] 6s2
Oxidation number (most stable)   2
Atomic radius [pm]   217.3
Ionic radius [pm]   136 (2+)
Abundance in crustal rocks [ppm]   390
Origin of the name   (greek) barys = heavy
Discovery   1808 by Humphry Davy
Uses   only the compounds are of technical importance such as barium carbonate and barium sulfate.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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