A Lewis dot
diagram is a representation of an element surrounded by its valence electrons.
The diagram consists of the element symbol (from the periodic table), with dots
on the top, bottom, and sides representing the **s** and **p** sub-levels
of its valence shell.

For example, aluminum has 3 valence electrons. The orbital-notation electron configuration for aluminum is:

_{}

Its Lewis
dot diagram is _{}

Notice that it shows two dots on the right for the full 3s sub-level, and one dot on the left for the one electron in the 3p sub-level.

Nitrogen has 5 valence electrons. Its orbital-notation electron configuration is:

_{}

Its Lewis
dot diagram would be _{}

Again, notice that it has 2 dots on the right for the 2s sub-level, and one dot on the top, bottom, and left sides for the one electron in each of the orbitals of the 2p sub-level.

Neon has 8 valence electrons. Its orbital-notation electron configuration is:

_{}

Its Lewis
dot diagram is _{}