Question

If a substance cannot be broken down chemically into a simpler substance what is it

Answer 1

Answer: an element

Step-by-step explanation:

Elements are only composed of one type of atom

Answer 2

Answer: An Element

Step-by-step explanation:

An element is a substance that cannot be split into smaller substance. It is made up of one kind of atom and can exist either as molecules (e.g nitogen) or an atom (e.g argon).