Lewis dot arrangement in the case of ammonia is illustrated by the valence electrons surrounding the nitrogen atom.
The dot dot structure in the case of NH3 displays that the nitrogen atom connects one pair of e- with each of the three hydrogen atoms, resulting in a total of a trio united pairs of electrons.
The NH3 molecule adopts a three-sided pyramid-like shape attributed to the placement of the valence electrons according to its Lewis dot structure.
In the Lewis symbol depiction of ammonia, the N atom is enclosed by three spots, each representing a pair of united electrons with a H atom.
