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Chromium (Cr): Fun Facts and Information About the Element

What is the symbol? Cr
What is the atomic number? 24
What is the atomic weight? 51.9961
What is the melting point in Celsius? 1857
What is the boiling point in Celsius? 2672
What is the density (g/cm3)? 7.19
What percent of the earths crust? 0.035
What year was it discovered? 1797
Who discovered the element? Louis-Nicholas Vauquelin
What group is the element in? 6
What is the electron configuration? [Ar] 3d5 4s1
What is the ionization energy? 6.7665
What element category is it in? Transition Elements

Where is Chromium Found?

The principal ore is chromite, which is found in ZimbabweRussia, New Zealand, Turkey, Iran, Albania, Finland, Democratic Republic of Madagascar, and the Phillippines. The metal is usually produced by reducing the oxide with aluminum.

What is Chromium Used For?

Chromium is used to harden steel, manufacture stainless steel, and form many useful alloys. It is mostly used in plating to produce a hard, beautiful surface and to prevent corrosion. Chromium gives glass an emerald green color and is widely used as a catalyst.

The refractory industry uses chromite for forming bricks and shapes, as it has a high melting point, moderate thermal expansion, and stability of crystalline structure.