 Electron density

The electron density describes the expected number of electrons per unit volume at position $\mathbf{r}$. For a system with a fixed number $N$ of electrons, $\int n(\mathbf{r})d^3\mathbf{r}=N$. A Lewis structure allocates electron counts without specifying this spatial density.

Electron density refers to the measure of the probability of an electron being found at a specific point in space within an atom or a molecule. It is often represented as a function of position and is crucial in quantum chemistry and atomic physics. The concept of electron density is fundamental in understanding the electronic structure of molecules and the distribution of electrons around nuclei.