What are protons and neutrons collectively called?

1. Protons and neutrons are the two fundamental particles that make up the nucleus. 2. Collectively, they are called nucleons. 3. Isotopes refer to atoms of the same element with different neutron counts, not the particles themselves. 4. Ions are charged atoms, and photons are particles of light, neither of which describes protons and neutrons. 5. So nucleons is correct. _Source: OpenStax Physics (CC BY 4.0), Ch 22 "The Atom", section 22.2 Nuclear Forces and Radioactivity_