Home 17 Cl Chlorine back to the periodic table
 
Atomic number   17
Symbol   Cl
Atomic weight   35.4527
Density [g/cm3]   2.95
Melting point [°C]   -101.0
Boiling point [°C]   -34.6
1st Ionization energy [eV]   12.967
Electronic configuration   [Ne] 3s2 3p5
Oxidation number (most stable)   7, 5, 3, 1, 1-
Atomic radius [pm]   99.4
Ionic radius [pm]   181 (1-)
Abundance in crustal rocks [ppm]   126
Origin of the name   (greek) chloros = green, named after the colour of the gas
Discovery   1810 by the English Humphry Davy
Uses   important raw material of the chemical industry, use as disinfectant and bleach, in addition, for the production of plastics (PVC). 
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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