Cr
Chromium

atomic no. 24, atomic wt. 52.01, metal, row 5, col. 6B, val. 2-3-6, orbits 2-8-13-1


{Merck Index - © 1952 by Merck & Co., Inc.}

Chromium. Cr; at. wt. 52.01; at. no. 24; valence 2-3-6. Discovered in 1797 by Vauquelin. Obtained from chrome ore (chromite FeCr2O4) by a silicothermic or aluminothermic process. Steel-gray, lustrous metal; hard as corundum and less fusible than platinum Takes a high polish. d. 7.1. m. 1900°. b. 2480°. Soluble in dil. HCI or H2SO4; insoluble in HNO3; attacked by caustic alkalies and alkali carbonates. Not oxidized by air, even in presence of much moisture.

Use: In manuf. of chrome-steel or chrome-nickel-steel alloys (stainless steel); for greatly increasing resistance and durability of metals; for chromeplating of other metals.

Commercially available.

{Mineral Deficiencies in Plants}

 
Link to Chemical Elements.com


Background on Chromium
Chromium's function in our bodies is critical:
without it, the hormone insulin would not work.

Chromium Forum Web Page

Hydroponic Reference Center Project Page

Color Pictures of Mineral Defeciencies in Plants

Site Link ListElement ListHydroponic Salts

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