Radioactivity

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Across
  1. 3. dating, especially carbon dating to measure the half life
  2. 5. film that can be also used to detect radiation
  3. 7. the most ionising
  4. 9. the sum of the number of neutrons and the number of protons
  5. 10. the number of protons in an atom
  6. 13. can stop alpha radiation
  7. 14. container used to store radioactive materials
  8. 15. hospital equipments by gamma radiation
  9. 16. detector using alpha particles which ionise the air
Down
  1. 1. characteristic of a beta particle
  2. 2. can be stopped by few mm of aluminium
  3. 4. treatment can be done by using gamma radiation
  4. 6. the time taken for the radioactive nuclei to decay into half
  5. 8. the most penetrating
  6. 11. property of gamma radiation
  7. 12. characteristic of an alpha particle