Across
- 2. one compound breaks into simpler substances
- 3. when both sides have equal atoms
- 6. releases heat energy
- 8. matter cannot be created or destroyed
- 11. a symbolic way to show a chemical reaction
- 13. symbols like (s), (l), (g), (aq)
- 14. starting substances in a chemical reaction
- 15. reaction with oxygen producing energy
Down
- 1. two or more substances combine
- 4. number in front of a chemical formula
- 5. shows direction of the reaction
- 7. substances formed in a chemical reaction
- 9. number showing atoms in a molecule
- 10. absorbs heat energy
- 12. speeds up a reaction without being used up