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Lewis dot structure in the case of NH3 is portrayed by the valence electrons surrounding the nitrogen atom.
The Lewis point arrangement for NH3 exhibits that the N atom shares a solitary pair of e- with each of the three H atoms, resulting in a overall of a trio connected pairs of electrons.
The NH3 molecule adopts a trigonal pyramidal form because of the distribution of the valence electrons according to its Lewis dot arrangement.
In the dot dotpoint representation of NH3, the nitrogen atom is enveloped by three points, each representing a pair of connected electrons with a H atom.