(a)[1]
The particles below are used to describe the structure of an atom: electron, neutron, proton, quark. Underline the fundamental particles from the list above.
(b)
The equation below shows the decay of a $^{60}_{27}\text{Co}$ nucleus to nucleus $Q$ by $\beta^{-}$ emission: $$^{60}_{27}\text{Co} \rightarrow {}^{A}_{B}Q + \beta^{-} + x.$$
(b(i))[1]
Finish Fig. 7.1.
(b(ii))[1]
State the name of particle $x$.