Electron pair Beverage cup arrangement for ammonia is a representation of the outer electrons surrounding the nitrogen atom. The dot dot structure in the case of NH3 exhibits that the N atom connects a solitary pair of e- with each of the three hydrogen atoms, resulting in a total of three joined pairs of electrons. The NH3 molecule takes a trigonal pyramidal form attributed to the arrangement of the valence electrons according to its Electron pair dot structure. In the dot symbol representation of NH3, the N atom is encircled by three points, each representing a pair of connected electrons with a H atom.