Lewis dot arrangement for NH3 is shown by the valence electrons surrounding the N atom. The Lewis dot arrangement in the case of NH3 unveils that the nitrogen atom joins one pair of e- with each of the three H atoms, resulting in a overall of three connected pairs of electrons. The ammonia molecule adopts a trigonal pyramidal structure due to the distribution of the outer electrons according to its Lewis dot structure. In the Lewis symbol depiction of NH3, the nitrogen atom is encircled by three spots, each representing a pair of shared electrons with a H atom.