A diagnostic kidney scan using a gamma camera takes approximately 45 minutes to complete.
The radiopharmaceutical used as a tracer has a half-life of about 8 hours.
State why an alternative isotope with a half-life of only 5 minutes is not suitable.
90 exam-style questions on Edexcel GCSE Physics 6.3 Nuclear equations and decay. Each one has a worked solution and a mark scheme showing where the marks go.