element words

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