element words

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Across
  1. 4. A lead-antimony alloy is used in batteries
  2. 7. the chemical element of atomic number 83
  3. 10. flares
  4. 11. chemical element
  5. 12. heaviest chemical element of Group
  6. 15. the chemical element of atomic number 41
  7. 16. in the manufacture of photocells
  8. 18. the chemical element of atomic number 97
  9. 19. the chemical element of atomic number 18,
  10. 20. the chemical element of atomic number 30
Down
  1. 1. the chemical element of atomic number 62,
  2. 2. scientific study and research.
  3. 3. keeps a chain reaction under control
  4. 5. chemical element with the symbol Pb and atomic number 82.
  5. 6. brilliant reds its salts give to fireworks
  6. 8. chemical element with the symbol Hs
  7. 9. the chemical element of atomic number 16,
  8. 13. cancer therapy.
  9. 14. he chemical element of atomic number 7
  10. 17. he chemical element of atomic number 5,
  11. 21. the chemical element of atomic number 6