yeye's crossword

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Across
  1. 5. substances with atoms that are alike
  2. 6. The number of molecules in a chemical equation
  3. 8. when a substance reacts with oxygen to produce energy in the form of light or heat.
  4. 9. formed from 2 or more elements proportions are always
  5. 10. displacement when water or gas forms two iconic compounds in solution are combined
Down
  1. 1. when one substance breaks down into two or more substances.
  2. 2. A substance that speeds up in a chemical reaction without being permanently changed.
  3. 3. when two or more substances combine to form another
  4. 4. when the energy given off is thermal
  5. 7. displacement when one element replaces a similar element forming a new element