How are atoms and elements

related?

A. Some elements contain only one type of

atom, while other elements contain more than

one type.

B. Every element contains many different types

of atoms.

C. Every element contains one type of atom.

C. Every element contains one type of atom.

Explanation:

Every atom can be labeled as only one kind of element. So there are gold atoms, iron atoms and so on. When you say "this element" it is basically the same as saying "this atom" or "This type of atom" So C is right.