(a(i))[3]
Complete the nuclide equation for this decay process: $^{194}_{77}\text{Ir} \rightarrow \;\ldots\ldots\text{Pt} + \ldots\ldots\beta$.
(a(ii))[2]
Calculate the count-rate from this sample after 38 hours.
(b)[2]
State two differences between $\gamma$-emission and $\beta$-emission.