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4.3 Hazards and uses of radioactive emissions and of background radiation

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Question 26
H

Sample 1 and sample 2 each contain 1.0 × 1020 undecayed nuclei. The half-life of sample 1 is 100 times the half-life of sample 2. Which statement about the two activities now is correct?

[1]
A

The activity of sample 1 is exactly 100 times the activity of sample 2

B

The activities are equal, because the samples contain equal numbers of nuclei

C

The activity of sample 1 is about one hundredth of the activity of sample 2

D

The activity of sample 1 is smaller only once one half-life has passed

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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