Ionising radiation

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1. From shortest to longest, order the length ionising radiation forms can travel

  • Alpha,Beta,Gamma
  • Alpha,Gamma,Beta
  • Gamma, Beta, Alpha
  • Gamma, Alpha,Beta
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2. How can gamma rays be stopped?

  • nothing can stop them
  • Thick lead
  • aluminium
  • paper

3. What does it mean by saying an element is radioactive?

  • It's nuclei are unstable, so may decay by emitting radiation.
  • None of the above
  • It blows things up
  • It needs a better phone

4. What is equivalent to an alpha particle?

  • a helium nucleus
  • a beta particle
  • a gamma ray
  • none of the above

5. A beta particle-

  • has no charge
  • can be stopped with a piece of paper
  • is an electron
  • is positively charged

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