Nucleus

The central part of an atom that contains the protons and neutrons. Plural nuclei. The nuclei of atoms are positively charged and contain by far most of their mass, all but about 0.05% or less.

The residual strong interaction between protons and neutrons, due to the strong charges of their quark constituents, is responsible for the binding of the nucleus.

See also: Atom, Atomic Radius, Bound State, Neutron, Nuclear Binding Energy, Nucleon, Proton.

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Subjects: Physics