pd5

1234567891011121314151617181920
Across
  1. 2. First actinide element
  2. 4. Radioactive noble gas
  3. 8. Named after Mendeleev, periodic table creator
  4. 11. Element in smoke detectors
  5. 12. Radioactive metalloid discovered by Curie
  6. 14. Used in neutron sources
  7. 18. Rare radioactive actinide
  8. 20. Named after Einstein
Down
  1. 1. Weakly radioactive actinide
  2. 3. Fuel for nuclear reactors
  3. 5. Synthetic actinide element
  4. 6. Synthetic actinide discovered in nuclear tests
  5. 7. Named after Marie Curie
  6. 9. Extremely rare, highly radioactive alkali metal
  7. 10. Fissile actinide used in reactors and weapons
  8. 13. Heavy, soft metal, symbol Pb
  9. 15. First transuranic element
  10. 16. Rare, radioactive halogen
  11. 17. Low-toxicity heavy metal with rainbow crystals
  12. 19. Radioactive alkaline earth discovered by Curie