Which statement correctly describes the properties or behaviour of radioactive emissions (α \alpha\,α particles, β−\beta^-β− particles, or γ \gamma\,γ photons)?
β−\beta^-β− particles emitted during the decay of a particular radioactive isotope all possess the exact same discrete kinetic energy.
When entering a uniform magnetic field perpendicular to their motion at the same speed, α\alphaα particles are deflected more than β−\beta^-β− particles because α\alphaα particles carry twice the magnitude of charge.
γ\gammaγ radiation consists of high-energy electromagnetic photons emitted when an unstable nucleus transitions from an excited state to a lower energy state, leaving both the proton number and nucleon number unchanged.
The high ionising power of α\alphaα particles means they have a long range in air, typically travelling up to several metres before being fully absorbed.
41 exam-style questions on OCR GCSE Physics Radioactive emissions. Each one has a worked solution and a mark scheme showing where the marks go.