Which statement about fundamental particles, their interactions, and conservation laws is correct?
Gluons are the exchange particles of the strong nuclear force between nucleons, while pions act as the exchange particles between quarks.
In β+\beta^+β+ decay, a proton decays into a neutron, a positron, and an electron neutrino, mediated by the W−W^-W− boson.
A muon (μ−\mu^-μ−) decays into an electron, a muon neutrino, and an electron antineutrino to conserve both charge and lepton family numbers.
Strangeness is conserved in all fundamental interactions, which explains why strange particles are always produced in pairs.
90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.