Question

Molecules _____.

Answer 1

Explanation:

By its classical definition, a molecule is the smallest particle of a substance that retains the chemical and physical properties of that substance. They are composed of two or more atoms, a group of like or different atoms held together by chemical forces.a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Answer 2

Answer:

D

Explanation:

A is incorrect because they are named by elements and the number of atoms.

B is incorrect because the smallest units of matter are usually considered to be atoms.

C is incorrect because O2 is considered a molecule, and is made of only one element.

So, D is correct, because molecules are groups of two or more atoms that are held together by chemical bonds.