Chemistry crossword puzzle

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Across
  1. 3. The end result of a chemical reaction.
  2. 5. A chemical reaction in which a single element replaces another element in a compound.
  3. 6. A chemical reaction in which two or more substances combine to form a new compound.
  4. 7. A chemical reaction that involves a substance combining with oxygen to produce heat and light.
  5. 8. A reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.
  6. 9. The order of reactivity of metals, showing which metals can displace others in a reaction.
Down
  1. 1. A process that involves rearrangement of the molecular or ionic structure of a substance
  2. 2. A reaction in which heat is added and a single compound breaks down into two or more simpler substances.
  3. 4. The starting materials in a chemical reaction.