(a)[2]
State the names of the particle types present in a plutonium-239 nucleus, and state how many of each type are there.
(b(i))[2]
Explain how the fission process gives rise to a chain reaction.
(b(ii))[2]
Explain how control rods are used to raise and lower the rate of the chain reaction in a nuclear reactor.
(c)[2]
State two ways in which an alpha particle and a beta particle differ.
(d(i))[2]
Draw a labelled diagram of either a cloud chamber or a spark counter. Show the radioactive source position as S.
(d(ii))[1]
State what produces the tracks in a cloud chamber or state what produces the sparks in a spark counter.