Periodic table

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Across
  1. 2. Essential for thyroid health (Symbol:
  2. 3. Commonly used metal (Symbol: Fe)
  3. 5. Second lightest element (Symbol:He)
  4. 7. Inert gas used in lighting (Symbol: Ar)
  5. 10. Used in electronics (Symbol: Si)
  6. 13. Used in toothpaste (Symbol: F)
  7. 16. Used to galvanize steel (Symbol: Zn)
  8. 19. The lightest element (symbol:H)
  9. 21. Used in nuclear power (Symbol:
  10. 23. Heavy metal (Symbol: Pb)
  11. 24. Liquid metal at room temperature
  12. 26. Noble gas used in signs (Symbol:
  13. 27. Essential for bones (Symbol: Ca)
  14. 29. Radioactive noble gas (Symbol:
  15. 30. Used in glassmaking (Symbol: B)
  16. 31. Used in batteries (Symbol: Li)
  17. 32. Lightweight metal (Symbol: Al)
Down
  1. 1. Used in disinfectants (Symbol:
  2. 4. Used in soldering (Symbol: Sn)
  3. 6. Important for muscle function (Symbol: Mg)
  4. 8. Makes up most of Earth's atmosphere (Symbol: N)
  5. 9. Precious metal (Symbol: Ag)
  6. 11. Valuable metal (Symbol: Au)
  7. 12. Vital for heart function (Symbol: K)
  8. 14. Important for DNA (Symbol:
  9. 15. Conductive metal (Symbol: Cu)
  10. 17. Found in all organic life (Symbol:
  11. 18. Pt)
  12. 20. Known for its distinct smell
  13. 22. Hg)
  14. 25. Rare and valuable metal
  15. 28. Essential for nerve function (Symbol: Na)