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5.2.3a Radioactive decay

Some radioactive nuclei decay to give new nuclei which are also radioactive. Part of a decay series is shown below:

^{232}_{90}\text{Th} \rightarrow {}^{228}_{88}\text{Ra} \rightarrow {}^{228}_{89}\text{Ac} \rightarrow {}^{228}_{90}\text{Th} \rightarrow {}^{224}_{88}\text{Ra} \rightarrow {}^{220}_{86}\text{Rn}

How many decays in this chain involve the emission of an $α\alpha$ -particle?

$1$

$2$

$3$

$5$

5.2.3a Radioactive decay Questions

120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.

Some radioactive nuclei decay to give new nuclei which are also radioactive. Part of a decay series is shown below:

^{232}_{90}\text{Th} \rightarrow {}^{228}_{88}\text{Ra} \rightarrow {}^{228}_{89}\text{Ac} \rightarrow {}^{228}_{90}\text{Th} \rightarrow {}^{224}_{88}\text{Ra} \rightarrow {}^{220}_{86}\text{Rn}

How many decays in this chain involve the emission of an $α\alpha$ -particle?

$1$

$2$

$3$

$5$

120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.