Nuclear density is the density of the nucleus of an atom, averaging about 1018 kg/m³. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different The nucleus of an Atom is the very dense region consisting of Nucleons ( Protons and Neutrons, at the center of an atom History See also Atomic theory, Atomism The concept that matter is composed of discrete units and cannot be divided into arbitrarily tiny The descriptive term nuclear density is also applied to situations where similarly high densities occur, such as within neutron stars. A neutron star is a type of remnant that can result from the Gravitational collapse of a massive Star during a Type II, Type Ib or Type

The nuclear density in a typical nucleus can be calculated from the size of the nucleus. The size of an atomic nucleus is of the order of 10^{-15} metres The radius of a typical nucleus is R = A1 / 3r0 where r0 is 1. 25 fm, with deviations of 0. The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International 2 fm from this value. The nucleon's density n satisfies

${4\over 3} \pi n R^3 = A$

Therefore $n = {3\over 4\pi {r_0}^3} = 0.122 \ \mathrm{fm}^{-3} = 1.22 \cdot 10^{44} \ \mathrm{m}^{-3}$. In Physics a nucleon is a collective name for two Baryons the Neutron and the Proton.
The mass density given above is the product of this by the nucleon mass 1. In Physics a nucleon is a collective name for two Baryons the Neutron and the Proton. 67×10−27 kg.

The components of an atom and of an atomic nucleus have varying densities. The proton is a fundamental particle, being composed of quark-gluon matter. The proton ( Greek πρῶτον / proton "first" is a Subatomic particle with an Electric charge of one positive Its size is approximately 10−15 meters and its density 1018 kg/m³. Using deep inelastic scattering, it has been estimated that the "size" of an electron, if it is not a point particle, must be less than 10−17 meters. Deep inelastic scattering is the name given to a process used to probe the insides of Hadrons (particularly the Baryons, such as Protons and Neutrons The electron is a fundamental Subatomic particle that was identified and assigned the negative charge in 1897 by J This would correspond to a density of roughly 1021 kg/m³.

Probing deeper within particles, one finds quarks which appear to be very dense and very hard. There are possibilities for still higher densities when it comes to quark matter, gluon matter, or neutrino matter. Quark matter or QCD matter (see QCD) refers to any of a number of theorized phases of matter whose degrees of freedom include Quarks and Gluons In the immediate future, the highest experimentally measurable densities will likely be limited to leptons and quarks. Leptons are a family of fundamental Subatomic particles comprising the Electron, the Muon, and the Tauon (or tau particle as well as their In Physics, a quark (kwɔrk kwɑːk or kwɑːrk is a type of Subatomic particle.