matter

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Across
  1. 5. spaces between molecules
  2. 7. change of matter from liquid to gas
  3. 9. has negative charge
  4. 11. solid substance that is soft at room temperature
  5. 13. space occupied by object
  6. 14. amount of matter in object
  7. 16. metal used in making jewels
  8. 17. melting point of ice
Down
  1. 1. metal used in making electric wires
  2. 2. cannot be used to put out petrol fires
  3. 3. has positive charge
  4. 4. an example of very active metal
  5. 6. is the building unit of matter
  6. 8. has indefinite shape and volume
  7. 10. they are seven levels
  8. 12. a solution that conducts electricity
  9. 15. has definite shape and volume