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The hybridization, number of lone pairs, and shape for different nitrogen compounds are being compared. Which of the following correctly describes all three nitrogen compounds? (P) NH2- (amide ion): hybridization = sp3, lone pairs on N = 2, shape = bent (Q) NH3 (ammonia): hybridization = sp3, lone pairs on N = 1, shape = pyramidal (R) NH4+ (ammonium ion): hybridization = sp3, lone pairs on N = 0, shape = tetrahedral

1. Only (P) is correct
2. Only (Q) is correct
3. Only (R) is correct
4. All of (P), (Q) and (R) are correct

Correct answer: All of (P), (Q) and (R) are correct

Solution

All three descriptions are correct: NH2- is sp3 with 2 lone pairs giving a bent shape, NH3 is sp3 with 1 lone pair giving a trigonal pyramidal shape, and NH4+ is sp3 with 0 lone pairs giving a tetrahedral shape.

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