Polonium-210 is a radioactive element that emits alpha (α\alphaα) particles. The nuclide notation for polonium-210 is Po84210Po\vphantom{\text{Po}}^{210}_{84}\text{Po}Po84210Po.
State the number of protons in one nucleus of polonium-210.
Determine the number of neutrons in one nucleus of polonium-210.
A sample containing 120 mg120\text{ mg}120 mg of polonium-210 decays to 15 mg15\text{ mg}15 mg in 414 days414\text{ days}414 days. Calculate the half-life of polonium-210.
Besides inhaled radioactive gases, background radiation is emitted from many other sources. Name two other sources that make a significant contribution to background radiation.
144 exam-style questions on CIE IGCSE Physics 5.2.4a Half-life. Each one has a worked solution and a mark scheme showing where the marks go.