Electron pair Beverage cup arrangement for NH3 is illustrated by the outer electrons surrounding the nitrogen atom. The dot dot structure for NH3 exhibits that the N atom joins a solitary pair of e- with each of the three H atoms, resulting in a overall of a trio joined pairs of electrons. The ammonia molecule adopts a three-sided pyramid-like form due to the placement of the outer electrons according to its Lewis dot structure. In the Lewis symbol depiction of ammonia, the nitrogen atom is surrounded by three dots, each representing a pair of united electrons with a hydrogen atom.