Radioactivity (A-level only)

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Question 1

Two radioactive nuclides, $R\,$ and $S$ , have half-lives of $minutes5.0\text{ minutes}$ and $minutes10.0\text{ minutes}$ , respectively. Two freshly prepared samples of $R\,$ and $S\,$ start decaying at the same time. After $minutes30\text{ minutes}$ , the number of radioactive nuclei in both samples is the same. The sample of $S\,$ initially contained $N\,$ radioactive nuclei. What was the initial number of radioactive nuclei in the sample of $R$ ?

$4 N$

$8 N$

$16 N$

$32 N$

Radioactivity (A-level only)

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Question 1

Two radioactive nuclides, $R\,$ and $S$ , have half-lives of $minutes5.0\text{ minutes}$ and $minutes10.0\text{ minutes}$ , respectively. Two freshly prepared samples of $R\,$ and $S\,$ start decaying at the same time. After $minutes30\text{ minutes}$ , the number of radioactive nuclei in both samples is the same. The sample of $S\,$ initially contained $N\,$ radioactive nuclei. What was the initial number of radioactive nuclei in the sample of $R$ ?

$4 N$

$8 N$

$16 N$

$32 N$

Radioactivity (A-level only)

Question 1

Radioactivity (A-level only) Questions

Radioactivity (A-level only)

Question 1

Radioactivity (A-level only) Questions