Across
- 4. Reaction that occurs when particles collide.
- 6. Bond can do this when they take in energy.
- 8. Substances produced in a chemical reaction.
- 9. Type of reaction used in hand-warmers.
- 10. Reaction that decreases the temperature of surroundings.
- 12. Burning.
Down
- 1. Substances taking part in a chemical reaction
- 2. Profile that is an energy level diagram.
- 3. Changes in this can indicate type of change.
- 5. Minimum energy needed for particles to react.
- 7. Reaction that brings pH to 7.
- 11. Hold particles together in a substance.