Which statement accurately reflects the composition of an atomic nucleus?

The atomic nucleus is made up of protons and neutrons, collectively known as nucleons. Protons carry a positive charge, which contributes to the overall positive charge of the nucleus, while neutrons are neutral particles that provide stability to the nucleus. The presence of both types of particles allows the nucleus to maintain its structure, as neutrons help to mitigate the repulsive forces between the positively charged protons.

Meanwhile, electrons are not part of the nucleus; they exist in orbitals around the nucleus, forming the outer region of an atom known as the electron cloud. Therefore, the options that mention only protons, only neutrons, or including electrons do not accurately represent the true composition of an atomic nucleus. Thus, the choice stating that the nucleus contains protons and neutrons captures the essential components accurately.