Atomic Number Density

Atomic number density, abbreviated as \( \eta \)  (Greek symbol eta), is the number of atoms of a particular element per unit volume of a substance.  It is a measure of how closely packed atoms are within a material.  The atomic number represents the number of protons in the nucleus of an atom of that element.  Therefore, the atomic number density is specific to a particular element and reflects how many atoms of that element are present in a given volume.  Atomic number density is used in various scientific and engineering fields, such as materials science, physics, and chemistry, where understanding the distribution and arrangement of atoms within a material is essential for predicting its properties and behavior.

 

Atomic Number Density Formula
\( \eta \;=\; \dfrac{  N }{ V }\)     (Atomic Number Density) \( N \;=\;  \eta \cdot V  \) \( V \;=\;  \dfrac{ N  }{ \eta }\)
Symbol	English	Metric
\( \eta \)  (Greek symbol eta) = atomic number density	\(atoms \;/\; in^3\)	\(atoms \;/\; mm^3\)
\( N \) = total number of atoms of the element	\(dimensionless\)	\(dimensionless\)
\( V \) = volume of substance	\(in^3\)	\(mm^3\)