Chemical Reactions & Equations

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Across
  1. 2. a number placed in front of an element symbol or chemical formula in an equation
  2. 6. law that states that the total mass of the reactants before a chemical reaction is the same as the total mass of the
  3. 7. a chemical reaction in which a substance combines with oxygen and releases energy
  4. 9. a type of chemical reaction in which one compound breaks down and forms two or more substances
  5. 10. a description of a reaction using element symbols and chemical formulas
  6. 12. a type of chemical reaction in which one element replaces another element in a compound
  7. 13. a type of chemical reaction in which the negative ions in two compounds switch places, forming two new
  8. 14. a type of chemical reaction in which two or more substances combine and form one compound
  9. 15. a substance that increases reaction rate by lowering the activation energy of a reaction
  10. 16. a chemical reaction that releases thermal energy
  11. 17. a substance that slows, or even stops, a chemical reaction
Down
  1. 1. a catalyst that speeds up chemical reactions in living cells
  2. 2. a process in which atoms of one or more substances rearrange to form one or more new substances
  3. 3. the minimum amount of energy needed to start a chemical reaction
  4. 4. a substance produced by a chemical reaction
  5. 5. after the chemical reaction
  6. 8. a chemical reaction that absorbs thermal energy
  7. 11. a starting substance in a chemical reaction