## Wikipedia - Densità elettronica (it) Wikipedia - كثافة إلكترونية (ar) electron density

https://doi.org/10.1351/goldbook.E01986
If $$P(x,\,y,\,z)\ \text{d}x\ \text{d}y\ \text{d}z$$ is the @[email protected] of finding an electron in the volume element $$\text{d}x\ \text{d}y\ \text{d}z$$ at the point of a molecular entity with coordinates $$x,\,y,\,z$$, then $$P(x,\,y,\,z)$$ is the electron density at this point. For many purposes (e.g. X-ray @[email protected], forces on atoms) the system behaves exactly as if the electrons were spread out into a continuously distributed charge. The term has frequently been wrongly applied to negative @[email protected]
See also:
charge density
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1110 [Terms] [Paper]