Answer :

Answer:

A nonmetal A can be found in two forms: B and C. B is the hardest natural substance, whereas C is an excellent electrical conductor. Determine A, B, and C.

Explanation:

Answer:

A = carbon

B = Diamond

C = Graphite

Explanation:

A is carbon. Diamond and graphite are allotropes of carbon. Diamond is the hardest natural substance and hence B is diamond. Graphite is a good conductor of electricity and hence C is graphite.