What's the Matter?

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Across
  1. 3. is anything that has mass and occupies space
  2. 6. describes two or more liquids that do not mix into each other
  3. 7. mixing occurs between individuals units
  4. 11. the chemical symbols and numbers indicating the atoms contained in the basic unit
  5. 12. describes two or more liquids that are able to dissolve into each other
Down
  1. 1. the smallest particle that has the properties of an element
  2. 2. substances are not uniformly mixed
  3. 4. any matter that has a fixed composition and definite properties
  4. 5. a substance made of atoms of more than one element
  5. 8. a substance that cannot be broken down
  6. 9. the smallest unit of a substance
  7. 10. a combination of more than one pure substance