Which particles are found in the nucleus of an atom?

The nucleus of an atom contains protons and neutrons, which are collectively known as nucleons. Protons are positively charged particles, while neutrons are neutral, meaning they have no charge. This composition gives the nucleus its overall positive charge due to the presence of protons.

Electrons, on the other hand, are not found in the nucleus; instead, they orbit the nucleus in various energy levels or shells. This distinction is crucial in understanding atom structure, as it highlights the different roles that particles play within the atom. The arrangement of protons and neutrons in the nucleus also contributes to the atomic mass of an element, while electrons are responsible for chemical reactions and bonding.