Electron pair Beverage cup structure for NH3 is illustrated by the valence electrons surrounding the N atom. The dot point structure for NH3 unveils that the N atom joins 1 pair of e- with each of the three H atoms, resulting in a complete of a trio shared pairs of electrons. The ammonia molecule adopts a three-sided pyramid-like shape due to the distribution of the outer electrons according to its Lewis dot arrangement. In the dot dotpoint representation of NH3, the N atom is enveloped by three dots, each representing a pair of shared electrons with a hydrogen atom.