Gce Model Questions Vol1 2018 Physics Question 32
Practice objective / multiple choice question 32 from the 2018 Gce Model Questions Vol1 Physics examination.
A 2.00 g sample of the radioactive isotope \(X\) (atomic mass 240 g mol\(^{-1}\)) decays by \(\alpha\) emission with a half‑life of 5.0 years, releasing 5.0 MeV per decay. After 12 years the sample is chemically processed to isolate the daughter isotope \(Y\), which is a \(\beta\) emitter with a half‑life of 2.0 years and releases 1.0 MeV per decay. The extracted \(Y\) is then allowed to decay completely. Using \(1\,\text{eV}=1.602\times10^{-19}\) J and Avogadro's number \(N_A=6.022\times10^{23}\) mol\(^{-1}\), calculate the total energy released (in joules) by the decays of \(X\) during the 12 years and by the subsequent complete decay of \(Y\).
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About This Question
This is Gce Model Questions Vol1 2018 Physics Question 32. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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