Four statements about isotopes of the same element are listed below. Which statement is correct?
They have different chemical properties.
They have the same nucleon number.
They have the same number of protons but different numbers of neutrons.
They have the same number of neutrons but different numbers 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.