How does the size of the single nucleus produced in a nuclear fusion reaction compare to the sizes of the two initial reacting nuclei?
It is larger than both of the reacting nuclei.
It is smaller than both of the reacting nuclei.
It is larger than one and smaller than the other of the reacting nuclei.
It is the same size as one reacting nucleus and smaller than the other.
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.