Home 8 O Oxygen back to the periodic table
 
Atomic number   8
Symbol   O
Atomic weight   15.9994
Density [g/l]   1.33
Melting point [°C]   -218.8
Boiling point [°C]   -183.0
1st Ionization energy [eV]   13.618
Electronic configuration   [He] 2s2 2p4
Oxidation number (most stable)   2-, 1-
Atomic radius [pm]   60.4
Ionic radius [pm]   140 (2+)
Abundance in crustal rocks [ppm]   455000
Origin of the name   (lat./greek) oxygenium = acid former
Discovery   1773-1774 by the German-Swedish chemist Carl Scheele and independently by the English Joseph Priestley
Uses   as a replacement of air in the steel industry (bessmer process), use for welding and as a fuel component for rockets.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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