reactions

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Across
  1. 4. reaction that forms water and carbon dioxide
  2. 5. substances that start chemical reactions
  3. 6. substances formed in a chemical reaction
  4. 7. the seven ________ molecules never appear alone
  5. 8. the process when new substances are formed
  6. 9. two reactants combine to form a single product
Down
  1. 1. representation of chemical reactions using element symbols
  2. 2. two compounds exchanging cations or anions
  3. 3. one element replaces another element in a compound
  4. 7. a compound breaks into two or more parts