iGCSE double award Radioactivity (Physics)

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1. What is the effect on the mass + atomic number on beta on the nucleus?

  • Atomic number increases by 1
  • Atomic number doesn't change
  • Decreases by 2
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2. How is the penetrating power of a gamma particle reduced?

  • It cannot be reduced
  • With a thick layer of lead
  • With paper or air
  • With 3mm of aluminium

3. What does a geiger-muller device do?

  • It measures the density of lead, which is used to stop gamma penetrating
  • It controls the number of radioactive particles in the air
  • It beeps in the presence of radiation. The more radiation, the more frequent the beeps
  • It absorbs all radioactive sources, including alpha, beta and gamma

4. What is radioactive dating?

  • Where a radioactive object is measured against the half life of carbon
  • Where a proton and neutron are attracted in a nucleus
  • Where two radioactive sources penetrate the same material simultaneously
  • When an atom of helium is magnetised, making it radioactive

5. What is the most common source of background radiation?

  • Weapons testing
  • Radon gas from the ground
  • Food and Drink
  • Medical sources


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