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4.3 Hazards and uses of radioactive emissions and of background radiation

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Question 2
F

Table shows the half-lives of three radioactive isotopes.

Table: The half-life of three radioactive isotopes

IsotopeHalf-life
Nitrogen-167 seconds
Iodine-1318 days
Uranium-2384500 million years
a.

Radioactive isotopes have a very wide range of half-life values. Use Table 1 to give one piece of evidence for this statement.

[1]
b.

A sample of nitrogen-16 and a sample of uranium-238 contain the same number of undecayed nuclei. Explain which sample has the higher activity.

[2]
c.

Explain why a spill of uranium-238 stays a hazard for far longer than a spill of nitrogen-16.

[2]
Markscheme

4.3 Hazards and uses of radioactive emissions and of background radiation Questions

  1. GCSE
  2. /Physics
  3. /4.3 Hazards and uses of radioactive emissions and of background radiation

40 exam-style questions on AQA GCSE Physics 4.3 Hazards and uses of radioactive emissions and of background radiation, covering 4.3.1 Background radiation, 4.3.2 Different half-lives of radioactive isotopes, and 4.3.3 Uses of nuclear radiation. Each one has a worked solution and a mark scheme showing where the marks go.

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