Which statement correctly describes the similarity and difference between atoms of two different isotopes of the same element?
They have the same number of neutrons but a different number of protons.
They have the same number of protons but a different number of neutrons.
They have different numbers of protons and different numbers of electrons.
They have the same number of neutrons and the same number of protons.
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.