Lewis Beverage cup arrangement in the case of ammonia is a representation of the outer electrons surrounding the N atom. The Lewis point arrangement for ammonia unveils that the nitrogen atom shares 1 pair of e- with each of the three H atoms, resulting in a total of 3 shared pairs of electrons. The NH3 molecule takes a three-sided pyramid-like form due to the placement of the outer electrons according to its Electron pair dot structure. In the Lewis symbol representation of ammonia, the N atom is surrounded by three dots, each representing a pair of united electrons with a H atom.