Atoms, nuclei and radiation — practice question

Two nuclides are two isotopes of the same element. Which statement about the nuclides is correct?

• ANeutral atoms of the nuclides have the same number of electrons.
• BNuclei of the nuclides have different numbers of protons.
• CNuclei of the nuclides have the same number of nucleons.
• DNuclei of the nuclides have the same number of neutrons.