Electron pair Beverage cup arrangement for NH3 is shown by the outer electrons surrounding the N atom. The Lewis point structure in the case of NH3 exhibits that the N atom joins a solitary pair of e- with each of the three H atoms, resulting in a complete of three joined pairs of electrons. The ammonia molecule adopts a trigonal pyramidal form due to the placement of the valence electrons according to its Lewis dot structure. In the Lewis dotpoint representation of NH3, the nitrogen atom is encircled by three spots, each representing a pair of joined electrons with a H atom.

Géométrie des molécules NH3 ; HCl ; CH4 ; C2H4 Free