Across
- 3. the atomic number is 5
- 7. is when a gas becomes a liquid
- 11. oxygen is usually the molecule
- 14. is the most stable element
- 15. change when two chemicals react to others
- 16. change when the size or shape changes
Down
- 1. the atomic number is 6
- 2. it only has 1 atom
- 4. 46% of the Earths weight is the answer
- 5. it is the least dense
- 6. particles never stop moving
- 8. it is the smallest unit of matter
- 9. reaction involves breaking chemical bound
- 10. reaction involves breaking chemical bound
- 12. floats on water
- 13. can take up any container
- 17. a hard object