1. Which of the following best explains the
relationship between molecules and atoms?
A
Atoms are molecules that have a charge.
B
Atoms have smaller parts, called
molecules.
С
Molecules are made up of two or more
atoms.
D
Molecules are atoms that have no mass.

С . Molecules are made up of two or more  atoms.

Explanation:

The relationship between molecules and atoms is that molecules are made up of two or more atoms.

Molecules are made up of atoms.

A molecule is the smallest particle of a substance element or compound capable of independent existence.

A molecule could be monoatomic, diatomic or polyatomic.

Monoatomic molecules are made up of one atom

Diatomic are made up of two different atoms

Polyatomic substances are made up of more than two kinds of atoms.