Electron pair dot arrangement in the case of ammonia is shown by the outer electrons surrounding the nitrogen atom.
The Lewis point structure in the case of ammonia exhibits that the nitrogen atom unites one pair of e- with each of the three hydrogen atoms, resulting in a overall of three united pairs of electrons.
The NH3 molecule takes a trigonal pyramidal shape attributed to the arrangement of the outer electrons according to its Electron pair dot arrangement.
In the dot symbol depiction of NH3, the N atom is enveloped by three dots, each representing a pair of united electrons with a hydrogen atom.
