PD3

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Across
  1. 2. First actinide element
  2. 5. Rare earth used in lasers
  3. 8. Precious metal used in jewelry and catalysts
  4. 10. High melting point metal in filaments
  5. 15. Rare earth in magnets and lasers
  6. 16. Heaviest lanthanide element
  7. 18. Corrosion-resistant metal in electronics
  8. 19. Toxic metal formerly used in electronics
  9. 21. Extremely rare, highly radioactive alkali metal
  10. 23. Low-toxicity heavy metal with rainbow crystals
  11. 26. Rare earth used in magnets
  12. 27. Radioactive rare earth element
  13. 28. Radioactive alkaline earth discovered by Curie
Down
  1. 1. Rare earth used in lasers and alloys
  2. 3. Metal in nuclear reactor control rods
  3. 4. Rare earth used in MRI contrast
  4. 6. Fluorescent material in screens
  5. 7. Heavy, soft metal, symbol Pb
  6. 9. Rare metal in superalloys
  7. 11. Shiny yellow metal, symbol Au
  8. 12. Radioactive noble gas
  9. 13. Very hard, corrosion-resistant metal
  10. 14. Rare, radioactive halogen
  11. 17. Only metal liquid at room temperature
  12. 18. Green phosphor in displays
  13. 20. Radioactive metalloid discovered by Curie
  14. 22. Least abundant lanthanide
  15. 24. Densest naturally occurring element
  16. 25. Pinkish rare earth in fiber optics