Across
- 7. states that mass can't be created or destroyed in chemical or physical changes.
- 8. a representation of a chemical reaction that uses symbols to show the relationship.
- 10. the smallest amount of energy that need to react.
- 11. any compound that increases the number of hydronium ion when dissolved.
- 13. process in which 1 or more substances change to make to make 1 or more new substances.
Down
- 1. a combination of chemical symbols and numbers to represent a substance.
- 2. substance that changes color in the presence of a acid or a base.
- 3. chemical reaction a that requires heat.
- 4. a reaction in which heat is released.
- 5. any compound that increases the number of hydronium ion when dissolved in water.
- 6. states energy can't be destroyed or created.
- 9. substance that slows down or stops a chemical reaction.
- 12. a substance that speeds up a reaction without being permanently changed.