Question

Which is the best description of a molecule?

A molecule of an element is composed of at least two types of atoms.
A molecule of a compound is composed of only one type of atom.
A molecule of a compound is composed of at least two types of atoms.
A molecule of an element is composed of exactly two types of atoms.

Answer 1

a

Step-by-step explanation:

Answer 2

The third option "A molecule of a compound is composed of at least two types of atoms" is correct

Step-by-step explanation:

This question isn't about molecules, it's about elements and compounds.

Elements are made of one and only one type of atoms, while compounds are made of more than one type of atoms.

(Molecules are just groups of atoms, it doesn't matter what they're made of)