Physics

Problem

2. A radon

{ }^{220} \mathrm{Rn}_{86}

nucleus emits an alpha particle becomes a A)

{ }^{216} \mathrm{Po}_{84}

{ }^{220} \mathrm{At}_{85}

{ }^{220} \mathrm{Rn}_{86}

{ }^{220} \mathrm{Fr}_{87}