Igcse Model Questions Vol1 2020 Physics Question 2
Practice objective / multiple choice question 2 from the 2020 Igcse Model Questions Vol1 Physics examination.
A sample initially contains \(2.0\times10^{6}\) atoms of a radioactive isotope \(A\). Isotope \(A\) decays to isotope \(B\) with a half‑life of \(30\) min, and isotope \(B\) subsequently decays to a stable isotope \(C\) with a half‑life of \(10\) min. No atoms of \(B\) are present initially. After \(40\) min the total activity of the sample (decays per second from both \(A\) and \(B\)) is measured. Calculate the activity of the sample at that time, giving your answer in becquerels (Bq).
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About This Question
This is Igcse Model Questions Vol1 2020 Physics Question 2. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Hard .
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