Which statement describes atoms that are isotopes of the same element?
They have the same number of protons but different numbers of neutrons.
They have the same number of protons but different numbers of electrons.
They have the same number of neutrons but different numbers of protons.
They have the same mass number but different atomic numbers.
51 exam-style questions on OCR GCSE Chemistry 1.2 Atomic structure, covering 1.2.1 Development of the atomic model, 1.2.2 The nuclear model and the size of atoms, and 1.2.3 Subatomic particles in atoms and ions. Each one has a worked solution and a mark scheme showing where the marks go.