Physics (AS & A Level) · Oct / Nov 2017 · Paper 42 · Question 12
9702
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The question as text
The isotope iodine-131 (131 53I) is radioactive with a decay constant of 8.6 × 10–2 day–1. β– particles are emitted with a maximum energy of 0.61 MeV.
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12(a)(i)[2]
12(a)(ii)[2]
12(b)[2]
12(c)(i)[3]
12(c)(ii)[2]
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