Balancing chemical equations

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Across
  1. 2. equation has unequal amounts of atoms
  2. 5. A form of measurement/anything that takes up space
  3. 6. acts as a equal sign in chemistry
  4. 8. the substance produced afterwards
  5. 9. a before an element
  6. 10. the basic building blocks of chemistry
Down
  1. 1. a number after a element
  2. 3. of conservation mass can't be created/destroyed
  3. 4. equation has equal amounts of atoms
  4. 7. a substance that takes part in a reaction