Question

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

Answer 1

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

Based on this information,

A.

carbon and hydrogen are elements and methane is a compound.

Answer 2

Well what’s the question exactly? I think you’ve posted a fact not a question. Can I possibly help you in any other way?