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6.5 Uses and dangers of radioactivity

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Question 9

A clinic will use a gamma-emitting tracer in a medical investigation. The tracer leaves the production site with an activity of 800 MBq800\ \mathrm{MBq}800 MBq. The journey to the clinic lasts 6 hours, and the isotope has a half-life of 2 hours.

What is the activity of the tracer when it reaches the clinic?

[1]
A

200 MBq200\ \mathrm{MBq}200 MBq

B

100 MBq100\ \mathrm{MBq}100 MBq

C

50 MBq50\ \mathrm{MBq}50 MBq

D

400 MBq400\ \mathrm{MBq}400 MBq

Markscheme

6.5 Uses and dangers of radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6.5 Uses and dangers of radioactivity

97 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity, covering 6.5.1 Uses of radioactivity, 6.5.2 Dangers of ionising radiation and precautions, 6.5.3 Half-life and radiation dangers, 6.5.4 Safety precautions for radiation exposure, and 6.5.5 Contamination and irradiation. Each one has a worked solution and a mark scheme showing where the marks go.

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