Which properties must a radioisotope have for its radiation to make it suitable for use as a medical tracer inside a patient's body?
Half-life of several minutes, emitting α\alphaα only
Half-life of several years, emitting β\betaβ only
Half-life of several hours, emitting γ\gammaγ only
Half-life of several hours, emitting α\alphaα only
484 exam-style questions on CIE IGCSE Physics 5.2 Radioactivity, covering 5.2.1 Background radiation and measuring count rate, 5.2.2a Alpha, beta and gamma emission, 5.2.2b Deflection and ionising effects of nuclear radiation, 5.2.3a Radioactive decay, 5.2.3b Effects of decay on the nucleus and decay equations, 5.2.4a Half-life, 5.2.4b Choosing isotopes for applications, and 5.2.5 Effects of ionising radiation and safety precautions. Each one has a worked solution and a mark scheme showing where the marks go.