All compounds are molecules because a molecule is 2 or more substances/elements combined and a compound is 2 or more elements combined. But not all molecules are elements because some molecules are just combined substances with no elements combined at all.
I would say the second option
Hope this helps *smiles*
Molecule is the general term used to describe any atoms that are connected by chemical bonds. Every combination of atoms is a molecule. A compound is a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds.
One example of a molecule is
(chlorine).
Examples of a compound is NaCl (sodium chloride) or
(water)
Explanation:
aluminium belongs to group 13 and period 3