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Cobalt - School Essays

Cobalt

My report is about the element . is the 27th element on the
periodical table and has an atomic number of twenty-seven. It has a symbol of
Co. ąs atomic weight is 58.9332. It has a melting point of 1,490š C. and
a boiling point of 2,900š C. 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 earthąs 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 ...

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to become
permanently magnetic. One alloy, called Stellite, is an alloy of cobalt,
chromium, tungsten, and molybdenum. This alloy is extremely hard and keeps its
hardness at extreme temperatures. It has many uses: cutting tools are made of
it along with gas turbines. Zaire is the worldąs largest producer of cobalt
with 65% of the worldąs reserve.
Cobalt is a common trace element found in food. It is a component of
vitamin B12. It is important to our health. But excessive amounts may cause
nausea, damage to the heart, kidneys, and nerves, and even cause death.
I think that Cobalt is a neat element. Before I did this report I knew
nothing of Cobalt. Now I know how they use it as an alloy and in other ways. ...

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Cobalt. (2004, January 22). Retrieved December 23, 2024, from http://www.essayworld.com/essays/Cobalt/1839

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"Cobalt." Essayworld.com. January 22, 2004. Accessed December 23, 2024. http://www.essayworld.com/essays/Cobalt/1839.

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PAPER DETAILS

Added: 1/22/2004 03:42:31 AM
Category: Science & Nature
Type: Premium Paper
Words: 332
Pages: 2

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