แบบโปรตอน–นิวตรอนของนิวเคลียส ไอโซโทป

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).

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