Chemical Reactions

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