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2. What is a positron?

  • An ionising electromagnetic wave
  • A positively charged electron
  • A beta particle
  • A neutron

3. Gamma radiation passes straight through you, so it is not at all dangerous.

  • False
  • True

4. Which of the following will NOT stop alpha radiation?

  • Skin
  • Paper
  • All of the above will stop alpha.
  • Air

5. What is gamma radiation?

  • An electron
  • An electromagnetic wave
  • A helium nucleus
  • A colour
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