Lewis dot structure for ammonia is a representation of the valence electrons surrounding the N atom. The dot dot arrangement for NH3 reveals that the nitrogen atom joins 1 pair of e- with each of the three H atoms, resulting in a total of a trio connected pairs of electrons. The ammonia molecule takes a three-sided pyramid-like structure because of the placement of the outer electrons according to its Electron pair Beverage cup arrangement. In the dot dotpoint depiction of ammonia, the N atom is surrounded by three dots, each representing a pair of joined electrons with a hydrogen atom.