Proton-neutron model of the nucleus. Isotopes
Lesson 2: Rutherford model. The nucleus contains protons (p⁺) and neutrons (n⁰). Isotopes are nuclei of the same element (same Z) with different numbers of neutrons (different A).
Lesson 2: Rutherford model. The nucleus contains protons (p⁺) and neutrons (n⁰). Isotopes are nuclei of the same element (same Z) with different numbers of neutrons (different A).