Electron pair dot arrangement for ammonia is depicted by the outer electrons surrounding the nitrogen atom. The Lewis point structure for NH3 displays that the nitrogen atom unites one pair of electrons with each of the three H atoms, resulting in a overall of a trio united pairs of electrons. The ammonia molecule takes a three-sided pyramid-like shape because of the placement of the valence electrons according to its Lewis dot structure. In the Lewis dotpoint depiction of ammonia, the nitrogen atom is enclosed by three points, each representing a pair of connected electrons with a hydrogen atom.