Chemistry elements quiz

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Across
  1. 4. nordic
  2. 6. haloradio
  3. 9. lazy
  4. 12. gold
  5. 13. laughing
  6. 14. alluminium
  7. 15. gitd
  8. 16. father
  9. 17. 272
  10. 18. European
Down
  1. 1. rotten
  2. 2. higher
  3. 3. ekaboron
  4. 4. berkeley
  5. 5. bullet
  6. 7. scientists
  7. 8. electropositive
  8. 10. gas
  9. 11. spectroscopy