Polonium–218 is produced as the daughter nucleus in the alpha-decay of radon–222 - Leaving Cert Physics - Question (i) - 2019

The nuclear equation for the alpha-decay of radon-222 can be represented as follows:

$\text{Rn}^{222}_{86} \rightarrow \text{Po}^{218}_{84} + \text{He}^{4}_{2}$

In this reaction, radon-222 ( $\text{Rn}$) decays into polonium-218 ( $\text{Po}$) and an alpha particle ( $\text{He}$). The alpha particle is equivalent to a helium nucleus.