In a nuclear power reactor, which particle is slowed down by a moderator to increase the likelihood of inducing a further fission reaction in uranium-235\text{uranium-235}uranium-235?
a neutron
a proton
an α\alphaα-particle
an electron
284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.