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Lewis Beverage cup structure in the case of NH3 is a representation of the outer electrons surrounding the N atom.
The dot dot arrangement for ammonia exhibits that the N atom joins a solitary pair of e- with each of the three H atoms, resulting in a complete of a
trio shared pairs of electrons.
The ammonia molecule takes a trigonal pyramidal shape attributed to the placement of the valence electrons according to its Lewis dot arrangement.
In the Lewis dotpoint depiction of NH3, the N atom is enveloped by three points, each representing a pair of united electrons with a hydrogen atom.