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