Electron pair dot structure in the case of ammonia is shown by the outer electrons surrounding the N atom. The dot point structure for ammonia reveals that the nitrogen atom joins one pair of e- with each of the three H atoms, resulting in a overall of three joined pairs of electrons. The NH3 molecule adopts a three-sided pyramid-like form attributed to the placement of the outer electrons according to its Lewis dot arrangement. In the dot symbol representation of ammonia, the N atom is enclosed by three dots, each representing a pair of connected electrons with a hydrogen atom.

9 Covalent Bonding Chemistry LibreTexts