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Group # 9

Discovered by Georg Brandt at 1735 in Sweden. He had been trying to demonstrate that the blue color of glass was because of a new element, cobalt, rather than bismuth, an element often found in the same locations as cobalt.

Cobalt Difluoride Formula=CoCl2

Cobalt Oxide Formula=Co0

Cobalt is known to improve rechargeable batteries and can be an important part of the battery systems of hybrid electric vehicles.

Fighting Cancer Cobalt can treat some forms of cancer

in the form of cobalt-60, a radioactive isotope of the element that produces gamma rays. Cobalt-60 can also be used to sterilize medical supplies.

Hard lustrous gray metal

minerals cobaltite, erythrite, and smaltite

Natural

Melting Point- 2723 °F Boiling Point-5301 °F

Solid

Chemically reactive stable in air and not affected by

water

The name cobalt comes from the German word kobalt , meaning evil spirit, the metal being so called by miners because it was poisonous.

Specific Heat (@20°C J/g mol): 0.456