Radioactivity

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Across
  1. 3. radiation that has 0 charge and mass
  2. 6. discovered radioactivity
  3. 9. energy to separate protons and neutrons
  4. 11. daughter nuclide formed when Uranium-238 undergoes alpha decay
  5. 14. region on a graph where stable isotopes lie
  6. 15. ability of radiation to pass through a medium
  7. 16. time taken for half the amount of radioactive sample to decay
  8. 17. deflected to the cathode in an electric field
Down
  1. 1. negative electrode
  2. 2. number of modes of decay
  3. 4. positive electrode
  4. 5. has the same mass as that of an electron
  5. 7. counter to detect radiation
  6. 8. plot of activity against time
  7. 10. collective name for protons and neutrons
  8. 12. type of radioactivity whereby a nucleus is induced to disintegrate
  9. 13. ratio of protons to electrons