Lewis Beverage cup structure in the case of ammonia is shown by the outer electrons surrounding the N atom. The dot point arrangement in the case of NH3 displays that the nitrogen atom joins 1 pair of e- with each of the three hydrogen atoms, resulting in a total of 3 joined pairs of electrons. The NH3 molecule adopts a three-sided pyramid-like shape due to the placement of the valence electrons according to its Electron pair Beverage cup structure. In the Lewis symbol representation of NH3, the nitrogen atom is enveloped by three points, each representing a pair of joined electrons with a hydrogen atom.