Chromium

 Chromium 
Cr
Atomic Number: 24
Atomic Weight: 51.9961
Element Type: Transition Metal
Crystal Structure: Cubic Body Centered
Melting Point: 1907.0°C = 3464.6°F = 2180.15 K
Boiling Point: 2671.0°C = 4839.8°F = 2944.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.85 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.18 Å
Electronegativity: 1.66

History

(Gr. chroma, color) Discovered in 1797 by Vauquelin, who prepared the metal the nextyear, chromium is a steel-gray, lustrous, hard metal that takes a high polish.


Sources

The principal ore is chromite, which is found in Zimbabwe, Russia, Transvaal, Turkey,Iran, Albania, Finland, Democratic Republic of Madagascar, and the Phillippines. The metalis usually produced by reducing the oxide with aluminum.

Search

Loading



Sponsors

USC University of Southern California Dornsife College Physics and Astronomy Department McMaster University Physics and Astronomy Department

Science Quote

'Every creative act involves ... a new innocence of perception, liberated from the cataract of accepted belief.'

Arthur Koestler
(1905-1983)

Deal of the Day

Image of Hover Craft Kit. Click on this image for more info. Hover Craft Kit
Regular Price: $29.99
Today's Price: $12.00
Learn the science behind hover craft technology with this cool kit! Buy it now! Deal ends at midnight!

Top Selling

Here are our physics & astronomy bestsellers:
Mini Plasma Ball
Slide Making Kit
Top Secret - Spinning Top
Wood Grain Newtons Cradle
Deluxe 3D Mirascope
Solar Radiometer
Periscope
Ultimate Chemistry Set CHEM C3000
Solar Science 4M Kit
3D Magnetic Field Tube