Molecules are different from atoms because they
a) have less energy
b) are much smaller
c) have unique properties
d) contain chemical bonds

Option (D) is the correct answer.

Explanation:

Molecules are defined as the substances which contain same type of elements which are chemically combined to each other.

For example, is a molecule which contains two same atoms that is, chlorine atoms.

In this molecule, the atoms are chemically combined together due to sharing of electrons. Hence, they tend to form covalent bonds.

Therefore, we can conclude that molecules are different from atoms because they contain chemical bonds.

65uuyhjghj8ykitdyidii