Periodic table

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Across
  1. 2. number 86.
  2. 4. we breathe it.
  3. 5. first.
  4. 7. stinky.
  5. 9. can be yellow or Grey, number 23.
  6. 10. very cold,number 80.
Down
  1. 1. number 51.
  2. 3. this number.
  3. 6. named by the 7th planet.
  4. 7. salty,number 11.
  5. 8. very chewy, silver-colored.