Cobalt Essay

This essay has a total of 329 words and 2 pages.

Cobalt

Cobalt


My report is about the element Cobalt. Cobalt is the 27th element on the
periodical table and has an atomic number of twenty-seven. It has a symbol of
Co. Cobalt¹s atomic weight is 58.9332. It has a melting point of 1,490s C. and
a boiling point of 2,900s C. Cobalt looks almost exactly like iron and nickel.
Cobalt is between iron and nickel on the periodical table and found in only .
001-.002 percent of the earth¹s crust. Cobalt was first found in the Harz
Mountains. People in the silver mines dug up arsenic cobalt ores. Then,
because they thought the ores contained copper, heated the ores releasing
arsenic trioxides. Cobalt was named after the German kobold. A kobold was said
to be an underground goblin or demon. In 1735 cobalt was identified. Cobalt is
a white metal with a bluish cast. It is magnetic and very hard and does not
tarnish.
Cobalt has many uses and I will talk about some of them. It is a very
expensive metal that is used in the manufacture of very many expensive alloys.
Cobalt-iron alloys have very unique and special magnetic properties. For
example, Hyperco is used as the nucleus in strong electromagnets. Alloys
containing titanium, aluminum, cobalt and nickel can be made to become
permanently magnetic. One alloy, called Stellite, is an alloy of cobalt,
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