* Molecule: A molecule is formed when two or more atoms bond together. These atoms can be the same element (like O₂ - oxygen gas) or different elements (like H₂O - water).

* Compound: A compound is a specific type of molecule. It's formed when two or more different elements bond together.

So, to answer your question directly:

* All compounds are molecules, but not all molecules are compounds.

Examples:

* Compounds: Water (H₂O), Carbon dioxide (CO₂), Sodium chloride (NaCl)

* Molecules that are NOT compounds: Oxygen gas (O₂), Nitrogen gas (N₂), Ozone (O₃)

Let me know if you'd like more examples or have any other questions!