Chemical Reactions

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Across
  1. 1. a chemical equation that has the same number of atoms of each element on both sides of the reaction arrow
  2. 5. show the number of molecules of each substance needed to balance a chemical reaction
  3. 9. mass in grams of one mole of a substance
  4. 11. a reaction in which one substance is broken down into two or more substances
  5. 12. a reaction in which two or more substances combine to form a new substance
  6. 13. the amount of energy needed to start a chemical reaction
Down
  1. 2. a substance dissolved in water
  2. 3. a reaction that absorbs heat energy
  3. 4. a reaction in which one element replaces another in a compound
  4. 6. the starting substances in a chemical reaction
  5. 7. the ending substances in a chemical reaction
  6. 8. a unit of measurement used to count atoms or molecules, equal to 6.022 x 10^24
  7. 10. a reaction that releases heat energy