In a nuclear reactor, a self-sustaining chain reaction relies on particles released during the fission of heavy nuclei to go on and induce further fission events. Which particle is responsible for sustaining this chain reaction?
a proton
a β\betaβ-particle
an α\alphaα-particle
a neutron
170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.