Géométrie et schéma de Lewis
Electron pair dot arrangement in the case of ammonia is a representation of the outer electrons surrounding the nitrogen atom. The dot point arrangement in the case of NH3 exhibits that the N atom unites a solitary pair of electrons with each of the three hydrogen atoms, resulting in a complete of 3 connected pairs of electrons. The NH3 molecule adopts a trigonal pyramidal form because of the distribution of the outer electrons according to its Lewis dot arrangement. In the Lewis dotpoint representation of NH3, the nitrogen atom is enclosed by three dots, each representing a pair of shared electrons with a H atom.