Spectral studies of Cr I and Cr II atoms

Spectral studies of Cr I and Cr II atoms

Observed and predicted spectrum of Cr I and Cr II atoms

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Chromium was discovered in 1780 by Nicolas Louis Vanquelin.Chromium was named from the Greek word chroma , meaning color because it forms a variety of colorful compounds. Chromium metal is an essential trace element, but hexavalent chromium (Cr(VI)) is very toxic and carcinogenic.Chromium is a silver, lustrous, very hard metal that can take a high mirror polish. It is also odorless, tasteless, and malleable. It does not tarnish in air, when heated it burns and forms the green chromic oxide. Chromium is unstable in oxygen.Its main uses are in alloys such as stainless steel, in chrome plating an...