Electron pair dot arrangement in the case of ammonia is a representation of the outer electrons surrounding the nitrogen atom.
The dot point structure for NH3 exhibits that the N atom shares one pair of e- with each of the three H atoms, resulting in a complete of 3 connected pairs of electrons.
The NH3 molecule takes a three-sided pyramid-like shape because of the distribution of the outer electrons according to its Lewis dot structure.
In the Lewis dotpoint representation of NH3, the nitrogen atom is enveloped by three dots, each representing a pair of connected electrons with a H atom.
