Across
- 3. Refer to number 24 of the periodic table, Cr
- 5. Substance that increases the rate of reaction
- 6. A type of reaction that releases energy
- 7. A type of reaction that absorbs energy
- 8. The smallest particle of a chemical element that can exist
- 9. A substance that takes part in and undergoes change during a reaction
- 11. A system that is not enclosed and does not have a constant pressure or volume, e.g. Atmospheric pressure
- 12. The chemical energy of a substance
- 13. A subatomic particle with a positive charge
Down
- 1. Subatomic particle with a neutral charge
- 2. measuring changes in state variables to determine the heat transfer
- 4. A group of atoms bonded together
- 10. A subatomic particle with a negative charge