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Lewis dot arrangement in the case of NH3 is depicted by the outer electrons surrounding the nitrogen atom.
The dot point
structure in the case of NH3 unveils that the N atom shares one pair of electrons with each of the three H atoms, resulting in a total of three connected pairs of electrons.
The NH3 molecule takes a trigonal
pyramidal form because of the arrangement of the outer electrons according to its Electron pair dot structure.
In the Lewis dotpoint depiction of ammonia, the N atom is encircled by three points, each representing a pair of connected electrons with a hydrogen atom.