matter

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Across
  1. 2. Basic unit of matter
  2. 4. Amount of space occupied by an object
  3. 6. a change from one state (solid or liquid or gas) to another without a change in chemical composition
  4. 9. the degree of compactness of a substance.
  5. 12. A group of atoms bonded together
  6. 13. gas to solid
  7. 14. a change of matter from one form to another without a change in chemical properties
  8. 15. positively charged particle
Down
  1. 1. 2 hydrogen atoms(+), 1 oxygen atom(-)
  2. 3. A change that occurs when one or more substances change into entirely new substances with different properties.
  3. 5. A small particle in the nucleus of the atom, with no electrical charge
  4. 7. Liquid to gas
  5. 8. An atom's central core, containing protons and neutrons.
  6. 10. solid to gas
  7. 11. used to measure the volume of a liquid