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Nuclear and particle physics

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Question 23

This question is about the properties and behavior of radioactive decay in a laboratory.

Which of the following statements is/are true?

  1. The activity of a sample is independent of its temperature, physical state, and chemical composition.
  2. For two radioactive samples with the same initial activity, the sample with the larger decay constant will have a greater initial number of undecayed nuclei.
  3. A plot of the natural logarithm of activity, ln⁡(A)\ln(A)ln(A), against time, ttt, yields a straight line with a gradient equal to −λ-\lambda−λ, where λ \lambda\,λ is the decay constant of the isotope.
A

1 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

Markscheme

Nuclear and particle physics Questions

  1. A Level
  2. /Physics
  3. /Nuclear and particle physics

90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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