Across
- 4. What you end with
- 9. Absorbs energy
- 12. A proccess that involves rearrangement of molecules
Down
- 1. Mass is neither created nor destroyed
- 2. A number placed in front of a formula to balance a chemical equation
- 3. Releases energy
- 5. Small numbers found to the right of each element
- 6. Symbolic representation of a chemical reaction
- 7. A cause of particular action or event
- 8. A substance that takes part in and undergoes change during a reaction
- 10. Allows and doesn't allow mass to flow freely
- 11. Something that starts a chemical reaction