Matter

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Across
  1. 4. A group of atoms bonded together
  2. 5. the degree of compactness of a substance.
  3. 7. a change from one state (solid or liquid or gas) to another without a change in chemical composition
  4. 9. negatively charged particle
  5. 11. The change of state from a liquid to a solid
  6. 12. A change that occurs when one or more substances change into entirely new substances with different properties.
Down
  1. 1. gas,solid,liquid,plasma
  2. 2. Amount of space occupied by an object
  3. 3. positively charged particle
  4. 4. The change in state from a solid to a liquid
  5. 6. 2 hydrogen atoms(+), 1 oxygen atom(-)
  6. 8. Basic unit of matter
  7. 10. a change of matter from one form to another without a change in chemical properties