Lewis dot arrangement for ammonia is depicted by the outer electrons surrounding the N atom. The Lewis point arrangement for ammonia unveils that the nitrogen atom unites 1 pair of e- with each of the three H atoms, resulting in a total of three joined pairs of electrons. The NH3 molecule adopts a trigonal pyramidal form because of 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 joined electrons with a hydrogen atom.