Matter

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