Electron pair Beverage cup arrangement in the case of ammonia is shown by the outer electrons surrounding the nitrogen atom. The dot point arrangement for NH3 displays that the nitrogen atom connects a solitary pair of e- with each of the three hydrogen atoms, resulting in a total of 3 connected pairs of electrons. The NH3 molecule takes a three-sided pyramid-like structure because of the distribution of the outer electrons according to its Lewis dot structure. In the Lewis symbol depiction of NH3, the nitrogen atom is enclosed by three dots, each representing a pair of connected electrons with a hydrogen atom.