Question

1. molecules that have more than one type of atom chemically bonded together...
2. a substance that is made of only one type of atom...
3. two or more substances that are not chemically combined...

Explanation:

1. Compounds are molecules with more than one type of atom chemically bonded.
2. Elements are substances made of only one - type of atom.
3. Mixtures are two or more substances not chemically combined.

Answer:

1. Compound
2. Element
3. Mixture