Chromium

 


 

Name Chromium
Symbol Cr
Atomic Number 24
Atomic Mass 51.9961 atomic mass units
Number of Protons 24
Number of Neutrons 28
Number of Electrons 24
Melting Point 1857.0 C
Boiling Point 2672.0 C
Density 7.19 grams per cubic centimeter
Normal Phase Solid
Family Transition Metal
Period 4
Cost $10 per 100 grams

 


 

Origin of Name From the Greek word chroma, meaning color
Date of Discovery In 1797 in France
Discovered by Louis-Nicolas Vauquelin
Common Compounds
Interesting facts
  • It is not found free in nature.
  • Chromite is its most important mineral.
  • World wide production each year is about 20,000 tons.
  • It is primarily found in Turkey, South Africa, Zimbabwe, Russia and the Philippines.
Common Uses
  • Stainless steel
  • Plating car parts, tools, and knives
  • Camouflage paint
  • Stereos
  • Video tapes
  • Lasers
  • Gives rubies and emeralds their color

 

Photo Courtesy of About.com
Chemical Elements
Environmental Chemistry
Web Elements
Wikipedia




Chromium Atomic Structure Elements by Name Elements by Number Home