Properties of Atoms & Molecules Unit 4 Vocabulary Review

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Across
  1. 4. symbolic representation of a chemical reaction
  2. 7. reaction in which one substance takes the place of another
  3. 10. the rate or speed at which a chemical reaction takes place
  4. 11. atoms or molecules formed by a chemical reaction
  5. 13. matter and energy cannot be created or destroyed; they can only change forms
  6. 15. reaction in which energy is stored
  7. 16. atoms or molecules present at the beginning of a chemical reaction
  8. 18. reaction in which two substances trade places
  9. 19. reaction in which energy is released
Down
  1. 1. catalyst in a different phase from the reactants
  2. 2. a molecule breaks apart into two or more atoms
  3. 3. two or more atoms combine to form a molecule
  4. 5. occurs when atomic bonds are formed or broken
  5. 6. energy stored in a molecule's bonds
  6. 8. catalyst involved in biological functions
  7. 9. substance that increases the reaction rate by lowering activation energy
  8. 12. catalyst in the same phase as the reactants
  9. 14. the energy required for a chemical reaction to take place
  10. 17. substance that slows down the reaction rate