A substance that can't be chemically broken down into simpler substances is
A) a homogeneous mixture.
B) an element.
C) a heterogeneous mixture.
D) a compound.
E) a gas.

Question

Quizplus · Accepted Answer

Only an element is a substance that cannot be chemically broken down into simpler substances. Homogeneous and heterogeneous mixtures are combinations of different substances, compounds are formed from two or more elements, and gases are a physical state of matter.

A Substance That Can't Be Chemically Broken Down into Simpler