Chemical equations

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Across
  1. 5. A pure substance that can't be broken down
  2. 6. The smallest unit of matter
  3. 7. The substances before the chemical reaction
  4. 8. The substances after the chemical reaction
  5. 10. Matter can't be created or ______
Down
  1. 1. Anything with mass that takes up space
  2. 2. An equation where both sides have equal amounts of atoms
  3. 3. Making an equation have the same amount of atoms on both sides
  4. 4. "The Law of Conservation of ___"
  5. 9. Two or more elements chemically combined