Electron pair Beverage cup arrangement in the case of ammonia is illustrated by the outer electrons surrounding the nitrogen atom. The Lewis point arrangement for ammonia displays that the nitrogen atom joins one pair of electrons with each of the three H atoms, resulting in a total of three connected pairs of electrons. The ammonia molecule takes a three-sided pyramid-like structure because of the distribution of the valence electrons according to its Lewis dot arrangement. In the Lewis symbol depiction of ammonia, the nitrogen atom is surrounded by three points, each representing a pair of shared electrons with a H atom.