Chromium
From Citizendium, the Citizens' Compendium
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Chromium is a chemical element, having the chemical symbol Cr. Its atomic number (the number of protons) is 24. It has a Standard Atomic Weight of 51.9961, and is typically found as a solid in its elemental form.
Chromium is considered to be a member of the "Transition Metal" family of elements, and has a boiling point of 2671°C.

