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Lewis dot structure for NH3 is a representation of the outer electrons surrounding the N atom.
The dot dot arrangement in the case of NH3 unveils that the nitrogen atom joins one pair of electrons with each of the three H atoms, resulting in a total of 3 joined pairs of electrons.
The ammonia molecule takes a trigonal pyramidal structure attributed to the distribution of the
outer electrons according to its Electron pair dot arrangement.
In the dot symbol depiction of ammonia, the nitrogen atom is enclosed by three dots, each representing a pair of joined electrons with a
H atom.