Lewis Beverage cup arrangement in the case of NH3 is portrayed by the valence electrons surrounding the N atom. The Lewis dot structure for NH3 exhibits that the N atom unites one pair of e- with each of the three hydrogen atoms, resulting in a overall of 3 connected pairs of electrons. The NH3 molecule takes a three-sided pyramid-like form attributed to the distribution of the outer electrons according to its Electron pair dot structure. In the dot dotpoint representation of ammonia, the N atom is enveloped by three points, each representing a pair of united electrons with a hydrogen atom.