This question is about radioactive materials.
State the name of the high-energy electromagnetic radiation emitted by some unstable nuclei when they undergo radioactive decay.
Describe the composition and the penetrating ability of a β−\beta^-β−-particle (beta-minus particle).
Sodium-24 is a radioactive isotope. It has a half-life of 15 hours.
A sample contains sodium-24. Calculate the percentage of sodium-24 that remains in the sample after 45 hours have passed.
134 exam-style questions on CIE IGCSE Physics 5.2.2a Alpha, beta and gamma emission. Each one has a worked solution and a mark scheme showing where the marks go.