If you look at the Lewis structure for NH3 we can see that it is not a symmetrical molecule. However, to determine if NH3 is polar we need to look at the molecular geometry or shape of the molecule. Polarity results from an unequal sharing of valence electrons. Because the NH3 molecule is not symmetrical there is a region of unequal sharing. The Nitrogen atom is more electronegative and therefore the valence electrons are near them more often. This makes it more negative. The Hydrogen atoms at the bottom of the structure are then more positive. Therefore, NH3 is a polar molecule.
Is NH3 Polar Or Nonpolar? (Ammonia) For Country: United States. City: Berkeley, Boise, Downey, Naperville, Oxnard
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