Lewis dot arrangement in the case of NH3 is depicted by the outer electrons surrounding the N atom. The dot point structure for ammonia displays that the N atom shares a solitary pair of e- with each of the three H atoms, resulting in a total of three united pairs of electrons. The ammonia molecule adopts a three-sided pyramid-like structure because of the arrangement of the outer electrons according to its Electron pair Beverage cup structure. In the dot dotpoint representation of ammonia, the N atom is enveloped by three points, each representing a pair of united electrons with a hydrogen atom.

62 Lewis Dot and Bonding Chemistry LibreTexts