Across
- 2. A substance created during a chemical reaction
- 5. the basic unit of a chemical element.
- 6. A substance that takes part in and undergoes change during a chemical reaction
- 8. absorbing heat
- 9. The process by which one or more substances
- 10. a thing that is composed of two or more separate element
Down
- 1. A chemical reaction in which heat is released
- 3. to produce one or more different substances
- 4. A chemical reaction in which heat is absorbed
- 7. Releasing heat