Lewis dot structure for NH3 is illustrated by the outer electrons surrounding the nitrogen atom. The dot dot arrangement in the case of ammonia displays that the N atom connects 1 pair of e- with each of the three H atoms, resulting in a overall of 3 shared pairs of electrons. The NH3 molecule takes a trigonal pyramidal form attributed to the arrangement of the outer electrons according to its Lewis dot arrangement. In the Lewis symbol depiction of ammonia, the nitrogen atom is surrounded by three dots, each representing a pair of joined electrons with a H atom.