A nuclide of element Y\text{Y}Y is represented by the symbol BAY^{A}_{B}\text{Y}BAY.
Which expression gives the number of neutrons in a single nucleus of this nuclide?
A+BA + BA+B
BBB
AAA
A−BA - BA−B
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.