(a)[2]
State what is meant by nuclear fission.
(b)[3]
Nuclear fission produces neutrons. In the power station, these neutrons can be taken up by rods made of boron-10. Complete the nuclear equation for the absorption of one neutron by a boron-10 nucleus with the release of an $\alpha$-particle: $^{10}_{5}\text{B} + \; \_\_\_ \rightarrow \; ^{\_\_}_{3}\text{Li} + \_\_\_.$
(c)[3]
Suggest why the rods heat up when neutrons are absorbed in the boron rods as a result of this nuclear reaction.