Across
- 1. a process by where one or two substances undergo change
- 4. a colorless, odorless flammable gas
- 6. basic unit of chemical element
- 9. starting material in chemical reaction
- 11. a particular kind of matter with uniform properties
- 13. a number below element telling how many atoms
- 14. large number telling how many molecules of substance
- 17. the quality of being hot;high temperature
- 18. power derived from the utilization of physical or chemical resources
- 19. The amount of product obtained in a chemical reaction
Down
- 2. accompanied by the release of heat
- 3. a colorless, odorless reactive gas
- 5. state of matter formed from solid and liquid states
- 7. a bond of atoms
- 8. substances formed from chemical reaction
- 10. a body having finite mass
- 12. a stable particle with positive charge
- 15. a symbolic representation of a compound
- 16. requiring the absorption of heat