Physics (AS & A Level) · Oct / Nov 2019 · Paper 42 · Question 12
9702
As printed in the paper
The question as text
Radon-222 (222 86 Ra) is a radioactive gas that decays randomly with a decay constant of 7.55 × 10–3 hour–1.
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Show the answer and mark scheme
12(a)(i)[1]
12(a)(ii)[2]
12(b)[5]
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