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Electron pair dot arrangement in the case of ammonia is portrayed by the outer electrons surrounding the nitrogen atom.
The Lewis dot structure in the case of NH3 displays that the N atom connects one pair of electrons with each of the three H atoms, resulting in a overall of a trio joined pairs of electrons.
The NH3 molecule takes a trigonal pyramidal shape because of the distribution of the valence electrons according to its Electron pair dot structure.
In the Lewis dotpoint representation of NH3, the nitrogen atom is surrounded by three points, each representing a pair of shared electrons with a H atom.