What is nuclear fusion?
the process by which electrons are removed from an atom to form ions
the splitting of a large, unstable nucleus to create two smaller nuclei
the merging of two light nuclei to form a single, heavier nucleus
the spontaneous emission of electromagnetic radiation from an unstable nucleus
170 exam-style questions on CIE IGCSE Physics 5.1.2a Composition of the nucleus and isotopes. Each one has a worked solution and a mark scheme showing where the marks go.