Chlorine-35 and chlorine-37 are isotopes.
Which statement describes isotopes?
Atoms with the same number of protons but a different number of electrons.
Atoms with the same number of electrons but a different number of protons.
Atoms with the same number of protons but a different number of neutrons.
Atoms with the same number of neutrons but a different number of protons.
77 exam-style questions on OCR GCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.