Which element is found in the nucleus of an atom?

The nucleus of an atom is comprised of two primary types of subatomic particles: protons and neutrons. Protons carry a positive charge, while neutrons have no charge and are neutral. Both are essential components of the nucleus and contribute significantly to the atom's mass and overall stability.

In contrast, electrons, which are negatively charged particles, orbit around the nucleus in various energy levels but are not located within the nucleus itself. Thus, the correct response indicating that the nucleus contains both protons and neutrons reflects the fundamental structure of atomic nucleus composition accurately. Understanding this structure is critical for delving into concepts of atomic behavior and interactions in chemistry and physics.