P2.5-Atomic Physics

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Across
  1. 2. If an element decayed and gained a proton what type of radiation was emitted?
  2. 4. The activity of radioisotope B is 652cpm, what is the activity of the isotope after 2 half-lives?
  3. 6. Which type of radiation is a wave?
  4. 7. Of the 3 isotopes of carbon, which is unstable?
  5. 10. Blocks background radiation from cosmic rays
  6. 11. Largest contributor to background radiation
  7. 13. The shorter the half-life of a radioactive isotope, the .... the decay
  8. 14. The half-life of a radioactive isotope is 30 mins. How long will it take for the activity to reduce to 1/8 of its value in minutes (answer using letters)?
  9. 15. How many neutrons does carbon 13 have?
Down
  1. 1. Naturally occurring particles released by decaying isotopes
  2. 3. A disadvantage of radiotherapy treatment is it leaves the patient ....
  3. 5. After 60 yrs, a 0.85g sample of radioactive element with a half life of 30 yrs remained, how many grams of the sample were there to begin with?
  4. 8. The difference between an X-ray and a gamma ray used in LINAC is that X-rays are generated from a ....
  5. 9. Largest danger of radiation
  6. 12. What does not penetrate paper?