Question

Which substance is one that cannot be separated or broken down into simpler substances by chemical means?

Answer 1

An Element

Step-by-step explanation:

An Element is a pure substance that is made up of same kind of atoms and cannot be broken down into simpler forms by any known chemical means.

Answer 2

Answer Element

Step-by-step explanation:

An element is a pure substance that cannot be separated into simpler substances by chemical or physical means.