Home 24 Cr Chromium back to the periodic table

Atomic number   24
Symbol   Cr
Atomic weight   51.9961
Density [g/cm3]   7.14
Melting point [°C]   1857
Boiling point [°C]   2482
1st Ionization energy [eV]   6.766
Electronic configuration   [Ar] 3d5 4s
Oxidation number (most stable)   6, 3, 2, 0
Atomic radius [pm]   124.9 (a)
Ionic radius [pm]   63 (3+)
Abundance in crustal rocks [ppm]   122
Origin of the name   (greek) chroma = colour
Discovery   1797 by the French Vauquelin
Uses   for the chromium plating of metal surfaces as corrosion protection, as alloying constituent in steel as well as to the colouring of glass.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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