Similarities:
* Both are made up of two or more atoms. This is the defining characteristic.
* Both represent a distinct substance with unique properties. The way atoms are bonded together in a compound/molecule determines its characteristics (e.g., water is a liquid at room temperature due to the bonding of hydrogen and oxygen).
Key Difference:
The key difference lies in the types of atoms involved:
* Molecule: Can be formed from atoms of the same element. For example, oxygen gas (O₂) is a molecule made up of two oxygen atoms.
* Compound: Always consists of atoms of different elements. For example, water (H₂O) is a compound made up of hydrogen and oxygen atoms.
In Summary:
All compounds are molecules, but not all molecules are compounds.
Think of it this way:
* Molecules are like a broader category, including all groups of atoms bonded together.
* Compounds are a specific type of molecule, requiring at least two different elements.
