Lewis dot arrangement in the case of ammonia is illustrated by the valence electrons surrounding the nitrogen atom. The Lewis point structure for ammonia reveals that the nitrogen atom connects a solitary 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 trigonal pyramidal form because of the placement of the valence electrons according to its Electron pair dot structure. In the Lewis symbol depiction of NH3, the N atom is encircled by three points, each representing a pair of shared electrons with a H atom.