NH3: Lewis structure and polarity
Jun 1，2026
How to draw the lewis structure for NH3?
Nitrogen (N) atom has 5 valence electrons, while Hydrogen (H) atom has only 1. There are 8 valence electrons available for the Lewis structure for Ammonia (NH3). In NH3 molecule, the central atom forms 3 N-H bonds and has 1 lone pair of electrons. The Lewis structure for NH3 molecule is showed below.
NH3 polarity
Firstly, we need to confirm if the N-H bond is polar. Depending on the difference in the electronegativity values, covalent bonds can be polar and nonpolar. The Pauling electronegativity values for N and H are 3.04 and 2.20, respectively. This results in an electronegativity difference of 0.84, making the N-H bond a polar covalent bond and Ammonia a polar molecule. The nitrogen atom is sp3 hybridized, forming three single σ bonds while retaining one non-bonding lone pair of electrons.
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