The nuclide notation for radon-222 is 86222Rn^{222}_{86}\text{Rn}86222Rn.
How many electrons orbit the nucleus of a neutral atom of radon-222?
000
868686
136136136
222222222
114 exam-style questions on CIE IGCSE Physics 5.1.1a Structure of the atom and ions. Each one has a worked solution and a mark scheme showing where the marks go.