Electron pair dot structure for ammonia is shown by the outer electrons surrounding the nitrogen atom. The Lewis dot structure for NH3 reveals that the nitrogen atom shares 1 pair of electrons with each of the three H atoms, resulting in a total of three shared pairs of electrons. The NH3 molecule adopts a three-sided pyramid-like shape because of the arrangement of the valence electrons according to its Electron pair dot structure. In the Lewis dotpoint depiction of NH3, the N atom is enveloped by three points, each representing a pair of joined electrons with a hydrogen atom.