Discovery of Radioactivity

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Across
  1. 1. Uraninium Ore which also known as
  2. 8. the time taken for the number of undecayed nuclei to be reduced to half of its original number
  3. 9. Successfully extracted from uranium ore
  4. 10. Marie and Pierre Currie detected radioactive radiation through___________ and not through photographic effect.
  5. 11. Antoine Henri Becquerel discoverd radioactivity through the investigation of__________
  6. 13. The__________decaying process of an unstable nuclei by emitting radioactive radiation
  7. 14. A german physicist that discovered x-ray
  8. 16. Marie Curie died at the age of 67 from prolonged exposure to________
Down
  1. 2. One of radioactive radiation,alpha particle is also known as________ nucleus
  2. 3. Produced________ that blackens photographic plates
  3. 4. random and spontaneous process where an unstable nucleus emit radioactive radiation until the nucleus become more stable
  4. 5. Receives Nobel Price in 1903
  5. 6. Antoine Henri Becquerel, French physicist, the first person to successfully discover______________
  6. 7. First unit of radioactivity
  7. 12. Successfully extracted from uranium ore
  8. 15. Marie Curie The only woman who receieved two _________Prizes