Nucleus of an atom

Definition

The nucleus is the central part of an atom that contains protons and neutrons. It is extremely dense and positively charged, while electrons orbit around it.

Related terms

Proton:

A subatomic particle found in the nucleus of an atom that carries a positive charge.

Neutron:

A subatomic particle found in the nucleus of an atom that carries no charge (neutral).

Electron:

A subatomic particle that orbits around the nucleus of an atom and carries a negative charge.