P5 Radioactive Materials

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Across
  1. 2. Used in medical tracers. Medium ionising/penetrative
  2. 6. An atom that is unstable and emits radiation
  3. 7. The process of an atom giving out radiation
  4. 8. Radioactive source on or in the body
  5. 9. Least ionising, most penetrative
Down
  1. 1. The time taken for half the atoms to decay
  2. 3. A dose of radiation that passes through
  3. 4. Process to kill cancer cells with radiation
  4. 5. Dangerous radiation left behind after a bomb
  5. 10. Highly ionising, least penetrative radiation