(a)[1]
State one way in which a hadron differs from a lepton.
(b(i))[2]
A proton inside a nucleus changes into a neutron and two additional particles. A partly completed equation for this process is $^{1}_{1}\text{p} \rightarrow {}^{1}_{0}\text{n} + \ldots + \ldots$. Complete the equation.
(b(ii))[1]
State the interaction or force responsible for this decay.
(b(iii))[3]
State three quantities that remain conserved during the decay.
(c)[3]
Use the quark composition of a proton to show that its charge is $+e$, where $e$ denotes the elementary charge. Show your working.