1. Carbon
Graphite, one of the softest materials known, is a form of carbon that is mainly used as a lubricant. ... In addition to its use as a lubricant, graphite, in a form that is known as coke, is used in large amounts in the production of steel. ... Other uses of carbon include: pencils, diamonds, steel, controlling of nuclear reactions, tire colorant, plastics, paint pigments, lubricants, and much more. ...
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- Grade Level: High School