9-12.P.1.4

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Across
  1. 1. a chemical reaction in which two or more substances combine to forrm a different substance
  2. 3. matter that is a combination of atoms of two or more elements
  3. 6. a chemical reaction in which the positive ions in two or more substances trade places
  4. 8. a neutral group of atoms that are joined together by one or more covalent bonds
  5. 9. rapid oxidation, or burning
Down
  1. 1. a chemical reaction in which one element replaces another element in a compound
  2. 2. new substances formed as a result of a chemical reaction
  3. 4. in a chemical reaction, the substance you start with before the reaction
  4. 5. a chemical reaction in which a substance breaks down into two or more simpler substances
  5. 7. an amount of a substance that contains approximately 6.02 X 10^23 particles of the substance