(a(i))[2]
Determine the numbers of protons, neutrons and electrons in a neutral tritium atom.
(a(ii))[2]
Draw a labelled diagram to show a simple model of how the protons, neutrons and electrons are arranged in a tritium atom.
(b(i))[2]
Tritium is radioactive and decays by $\beta^{-}$ emission to produce an isotope of helium (He). No gamma radiation is released in this decay. Complete the equation to show the radioactive decay of tritium: $^{3}_{1}\mathrm{H} \rightarrow \; ^{\phantom{0}}_{\phantom{0}}\mathrm{He} + ^{\phantom{0}}_{\phantom{0}}\beta + ^{0}_{0}X$.
(b(ii))[1]
State the name given to particle $X$.
(c)[2]
Determine the quark makeup of a tritium nucleus.