Indigo's crossword

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Across
  1. 2. Has atomic number of 79
  2. 5. is a gas
  3. 6. molecules that are a combination of 2 or more elements
  4. 9. the sign H
  5. 11. change one of the 2 changes
  6. 12. the symbol for iron
  7. 13. a type of movement
  8. 14. we need it to survive
  9. 15. when atoms combined
Down
  1. 1. the surface of an object
  2. 3. incredibly small partials to small to be seen
  3. 4. can take the shape or form of anything
  4. 7. we breathe it in
  5. 8. one of the only liquids in the periodic table
  6. 10. gas that smells
  7. 11. table where you can see all the elements
  8. 13. cannot be broken down
  9. 14. a increased temperature
  10. 16. the sign for carbon dioxide
  11. 17. something that cant change its shape