Electron pair Beverage cup arrangement in the case of ammonia is portrayed by the outer electrons surrounding the nitrogen atom. The Lewis dot arrangement in the case of ammonia exhibits that the N atom shares 1 pair of e- with each of the three hydrogen atoms, resulting in a total of 3 connected pairs of electrons. The NH3 molecule adopts a three-sided pyramid-like structure due to the distribution of the outer electrons according to its Lewis Beverage cup structure. In the dot symbol representation of ammonia, the N atom is enclosed by three points, each representing a pair of shared electrons with a H atom.