Question

What substance is composed of only 1 type of atom

Answer 1

chemical element is a substance

Step-by-step explanation:

A chemical element is a substance that contains only one type of atom. If a substance contains more than one type of atom, it is a compound. An element can be a solid, liquid or gas. The smallest particle of such an element is an atom.

Answer 2

A chemical element.

Explanation: If it had more than one atom it would be considered a compound.