Periodic Table Crossword

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Across
  1. 1. - Heavy element used in radiation shielding?
  2. 3. - Noble gas that glows white when ionized?
  3. 5. - Used in salts to make red fireworks?
  4. 7. - Element named after Copenhagen?
  5. 10. - Liquid golden alkali metal?
  6. 12. - Element number 13?
  7. 15. - Used as a key ingredient in steel?
  8. 18. - Last element discovered as of 2025?
  9. 20. - Used to significantly strengthen many steel?
  10. 21. - Used to make cans?
  11. 23. - Very light metal and hard to destroy?
  12. 25. - Element named after a danish scientist?
  13. 27. - Oxidises a greenish blue?
  14. 28. - Element used in very strong magnets?
  15. 29. - Which element is usually depicted as green?
  16. 31. - Densest element?
  17. 34. - Used in lighting?
  18. 35. - Noble gas usually used for lasers?
  19. 37. - Which element makes your voice squeaky?
  20. 38. - Which element is Au?
  21. 39. - Used to make stainless steel?
  22. 40. - Light element used in space rockets?
  23. 41. - Heavy element with the highest melting point?
Down
  1. 1. - First element in the lanthanide group
  2. 2. - Most inert element that is not a noble gas?
  3. 4. - Used in some batteries?
  4. 6. - Used in glowing signs?
  5. 8. - First fully artificial element (that is not technetium or promethium)?
  6. 9. - First human-made element?
  7. 11. - Used in lightbulb filaments?
  8. 13. - Softest metal?
  9. 14. - Used to make technetium?
  10. 16. - Radioactive noble gas?
  11. 17. - Most reactive element?
  12. 19. - What gas makes up most of the atmosphere?
  13. 22. - Last element formed before a star supernovaes?
  14. 24. - Element that burns white as well as in CO₂?
  15. 26. - Which element makes up 2 3rds of water by atoms?
  16. 30. - Toxic metalloid element?
  17. 32. - The most conductive element?
  18. 33. - Used in reactor shielding?
  19. 36. - Red highly corrosive halogen?