Chromium
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 Crocoite (PbCrO4) |
Chromium ( ) is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable. The name of the element is derived from the Greek word "chrōma" (χρώμα), meaning colour, because many of its compounds are intensely coloured. Chromium oxide was used by the Chinese in the Qin dynasty over 2,000 years ago to coat weapons such as bronze crossbow bolts and steel swords found at the Terracotta Army. It later came to the attention of the West when it was discovered by Louis Nicolas Vauquelin in the mineral crocoite (lead(II) chromate) in 1797. Crocoite was used as a pigment, and after the discovery that the mineral chromite also contains chromium, this mineral was used to produce pigments as well.
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| ATSDR Case Studies in Environmental Medicine: Chro... ATSDR Case Studies in Environmental Medicine: Chromium Toxicity www.atsdr.cdc.gov/csem/chromium - Web |
| IARC Monograph "Chromium and Chromium compounds" IARC Monograph "Chromium and Chromium compounds" www-cie.iarc.fr/htdocs/monographs/vol49/chromium.html - Web |
| It's Elemental – The Element Chromium It's Elemental – The Element Chromium education.jlab.org/itselemental/ele024.html - Web |
Gallery for «Chromium»
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| National Pollutant Inventory – Chromium (III) comp... National Pollutant Inventory – Chromium (III) compounds fact sheet www.npi.gov.au/database/substance-info/profiles/24.html - Web |
| The Merck Manual – Mineral Deficiency and Toxicity The Merck Manual – Mineral Deficiency and Toxicity www.merck.com/mmpe/sec01/ch005/ch005b.html - Web |
| National Institute for Occupational Safety and Hea... National Institute for Occupational Safety and Health – Chromium Page www.cdc.gov/niosh/topics/chromium/ - Web |
| The periodic table of videos: Chromium The periodic table of videos: Chromium www.periodicvideos.com/videos/024.htm - Web |
