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Chromium
by Jesse Russell and Ronald Cohn and Jesse Russel


Overview - High Quality Content by WIKIPEDIA articles Chromium ( /ˈkroʊmiəm/ kroh-mee-əm) 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.  Read more...

 
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More About Chromium by Jesse Russell; Ronald Cohn; Jesse Russel
 
 
 
Overview
High Quality Content by WIKIPEDIA articles Chromium ( /ˈkroʊmiəm/ kroh-mee-əm) 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 latter mineral was used to produce pigments as well.


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Details
  • ISBN-13: 9785510579574
  • ISBN-10: 5510579579
  • Publisher: Book on Demand Ltd.
  • Publish Date: January 2013
  • Page Count: 146
  • Dimensions: 8.27 x 5.83 x 0.31 inches
  • Shipping Weight: 0.4 pounds


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