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History
Chromium
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Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.
Chromium
Chromium
Sample of pure chromium metal
Sample of pure chromium metal
Chromium(II) carbide (Cr3C2)
Chromium(II) carbide (Cr3C2)
Anhydrous chromium(III) chloride (CrCl3)
Anhydrous chromium(III) chloride (CrCl3)
Chemical symbol
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Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.
Dalton's symbols for the more common elements, as of 1806, and the relative weights he calculated. The symbols for magnesium and calcium ("lime") were
Dalton's symbols for the more common elements, as of 1806, and the relative weights he calculated. The symbols for magnesium and calcium ("lime") were replaced by 1808, and that for gold was simplified.