Electron pair dot structure in the case of ammonia is a representation of the outer electrons surrounding the nitrogen atom. The Lewis dot arrangement in the case of NH3 unveils that the nitrogen atom connects a solitary pair of e- with each of the three hydrogen atoms, resulting in a overall of three shared pairs of electrons. The ammonia molecule adopts a three-sided pyramid-like form attributed to the placement of the valence electrons according to its Electron pair Beverage cup structure. In the dot symbol depiction of NH3, the nitrogen atom is surrounded by three dots, each representing a pair of united electrons with a hydrogen atom.

BF3 Lewis Structure Molecular Geometry and Hybridization