Molecules are the smallest units of matter with the characteristic properties of a substance. a. Trueb. False

a. True

Explanation:

Molecule -

It refers to a group of two or more than two atoms, which can exists freely on it own, is referred to as a molecule. The molecule is a neutral group, where the atoms are bounded by chemical bonds. Molecule have a characteristic property of the substance.

Hence, the given statement about molecule, is true.