Across
- 2. it can never be changed
- 3. the smallest part of a compound
- 5. water in gaseous form
- 6. a chemical equation must be like this
- 9. it is a physical property
- 11. the smallest part of an element
- 12. are broken in a chemical change
- 13. can be written before a formula
Down
- 1. a substance made of more elements
- 4. a solid becoming liquid
- 7. law reguarding mass
- 8. in it new substances are formed
- 10. are obtained in a chemical reaction