Electron pair dot arrangement for NH3 is a representation of the valence electrons surrounding the N atom. The Lewis point structure for ammonia exhibits that the N atom connects one pair of e- with each of the three H atoms, resulting in a overall of 3 connected pairs of electrons. The NH3 molecule adopts a trigonal pyramidal structure because of the arrangement of the outer electrons according to its Electron pair Beverage cup structure. In the Lewis dotpoint representation of NH3, the nitrogen atom is enclosed by three dots, each representing a pair of connected electrons with a hydrogen atom.