Electron pair dot arrangement in the case of ammonia is depicted by the valence electrons surrounding the nitrogen atom. The Lewis dot structure in the case of ammonia unveils that the nitrogen atom unites a solitary pair of e- with each of the three hydrogen atoms, resulting in a total of three united pairs of electrons. The NH3 molecule takes a three-sided pyramid-like shape because of the placement of the outer electrons according to its Lewis dot arrangement. In the dot symbol representation of NH3, the nitrogen atom is encircled by three points, each representing a pair of connected electrons with a H atom.

Lewis Dot Structures Chemistry LibreTexts