Chemical Reactions

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Across
  1. 1. the substances produced at the end of the reaction
  2. 3. a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat
  3. 6. a reaction in which one element is substituted for another element in a compound
  4. 7. the substances that go into a chemical reaction
  5. 8. reactants combine to form a single product
Down
  1. 2. occur when chemical bonds between atoms are formed or broken
  2. 4. a chemical substance is transformed into one or more different substances
  3. 5. a single reactant breaks down into simpler ones