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Radionuclide imaging and therapy (A-level only)

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Question 11

A patient is administered a mixture of two radioactive tracers, Tracer P and Tracer Q, for a diagnostic scan.

At the time of administration, the activity of Tracer P is 320 MBq320\text{ MBq}320 MBq and the activity of Tracer Q is 512 MBq512\text{ MBq}512 MBq.

Tracer P has a half-life of 6 hours6\text{ hours}6 hours and Tracer Q has a half-life of 8 hours8\text{ hours}8 hours.

What is the total combined activity of Tracer P and Tracer Q remaining after 24 hours24\text{ hours}24 hours?

A

20 MBq20\text{ MBq}20 MBq

B

64 MBq64\text{ MBq}64 MBq

C

84 MBq84\text{ MBq}84 MBq

D

104 MBq104\text{ MBq}104 MBq

Markscheme

Radionuclide imaging and therapy (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Radionuclide imaging and therapy (A-level only)

23 exam-style questions on AQA A Level Physics Radionuclide imaging and therapy (A-level only), covering Imaging techniques (A-level only), Half-life (A-level only), Gamma camera (A-level only), Use of high-energy X-rays (A-level only), Use of radioactive implants (A-level only), and Imaging comparisons (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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