Electron pair Beverage cup structure for NH3 is shown by the valence electrons surrounding the N atom. The dot dot arrangement in the case of NH3 reveals that the nitrogen atom joins 1 pair of e- with each of the three H atoms, resulting in a overall of a trio shared pairs of electrons. The ammonia molecule takes a three-sided pyramid-like shape attributed to the placement of the outer electrons according to its Electron pair dot arrangement. In the Lewis symbol depiction of ammonia, the nitrogen atom is enveloped by three spots, each representing a pair of connected electrons with a H atom.