(a)[1]
State one distinction between a hadron and a lepton.
(b(i))[2]
State the quark content of a proton and of a neutron.
(b(ii))[1]
Use your answer in (i) to work out the quark composition of an $\alpha$-particle.
(c(i))[1]
The results of the $\alpha$-particle scattering experiment give evidence for atomic structure. Result 1: The vast majority of $\alpha$-particles go straight through the metal foil or are turned through small angles. State what may be inferred from result 1.
(c(ii))[2]
The results of the $\alpha$-particle scattering experiment give evidence for atomic structure. Result 2: A very small minority of $\alpha$-particles are scattered through angles greater than $90^\circ$. State what may be inferred from result 2.