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4.2 Atoms and nuclear radiation

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Question 19
F

Sealed sources P and Q contain equal numbers of undecayed nuclei. P has a half-life of 2 hours and Q has a half-life of 2 years. Which statement is correct?

[1]
A

P and Q have equal activity because they contain equal numbers of nuclei

B

Q has the higher activity because its nuclei stay undecayed for longer

C

P has the higher activity because its nuclei are larger than those in Q

D

P has the higher activity because its nuclei decay at a faster rate

Markscheme

4.2 Atoms and nuclear radiation Questions

  1. GCSE
  2. /Physics
  3. /4.2 Atoms and nuclear radiation

40 exam-style questions on AQA GCSE Physics 4.2 Atoms and nuclear radiation, covering 4.2.1 Radioactive decay and nuclear radiation, 4.2.2 Nuclear equations, 4.2.3 Half-lives and the random nature of radioactive decay, and 4.2.4 Radioactive contamination. Each one has a worked solution and a mark scheme showing where the marks go.

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