Verified Answer :

rcukierkorn

You can automatically rule out CHâ‚„ since it has no lone pairs at all around the central atom. Water has 2. Ammonia is the only Lewis structure that contains one lone pair.

mcclainethan00

The ammonia molecule contains three single bonds and one lone pair on the central nitrogen atom . The domain geometry for a molecule with four electron pairs is tetrahedral, as was seen with CH4. In the ammonia molecule, one of the electron pairs is a lone pair rather than a bonding pair.

Hope this helps :}

-bucky

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