(a)[2]
For a neutral atom of radon-222, state: 1. the number of protons, 2. the number of neutrons, 3. the number of electrons.
(b)[2]
Complete the equation showing the decay of radon-222: $^{222}_{86}\text{Rn} \rightarrow$
(c)[3]
Calculate the number of $\alpha$-particles emitted by the radon nuclei over the next 7.6 days.