Nucleus

Definition

The nucleus is the central part of an atom that contains protons and neutrons. It has a positive charge due to the presence of protons.

Related terms

Proton: A subatomic particle found in the nucleus with a positive charge.

Neutron: A subatomic particle found in the nucleus with no charge.

Atomic Number: The number of protons in an atom's nucleus, which determines its identity on the periodic table.