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4.3 Hazards and uses of radioactive emissions and of background radiation

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Question 27
H

A medical tracer must have a half-life that is neither too short nor too long. Which pair of reasons is correct?

[1]
A

Too short: the dose to the patient is far too large. Too long: the scan cannot be completed

B

Too short: the radiation is too penetrating. Too long: the radiation is too ionising

C

Too short: the tracer leaves the body too quickly. Too long: the activity is too high

D

Too short: the activity falls before the scan ends. Too long: the patient's dose is too large

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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