Electron pair Beverage cup structure in the case of NH3 is illustrated by the outer electrons surrounding the nitrogen atom. The Lewis point arrangement in the case of NH3 displays that the nitrogen atom unites a solitary pair of e- with each of the three hydrogen atoms, resulting in a complete of 3 connected pairs of electrons. The ammonia molecule takes a trigonal pyramidal structure attributed to the distribution of the outer electrons according to its Electron pair dot arrangement. In the dot symbol representation of NH3, the nitrogen atom is enveloped by three points, each representing a pair of joined electrons with a hydrogen atom.