The unstable nucleus of an element undergoes radioactive decay. The nucleon number remains unchanged, while the proton number increases by 1.
Which description of this radioactive decay event is correct?
The nucleus emits an α\alphaα-particle.
The nucleus emits a β−\beta^-β−-particle.
The nucleus emits a positron.
The nucleus emits γ\gammaγ-radiation.
120 exam-style questions on CIE IGCSE Physics 5.2.3a Radioactive decay. Each one has a worked solution and a mark scheme showing where the marks go.