The number of resonance structures for the nitrate ion that satisfy the octet rule is
A) 1.
B) 2.
C) 3.
D) 4.
E) none of these

Question

Quizplus · Accepted Answer

The nitrate ion (NO3-) has three resonance structures that satisfy the octet rule. Each structure has the nitrogen atom in the center with a double bond to one of the oxygen atoms and single bonds to the other two oxygen atoms, with one of the oxygen atoms carrying a negative charge. These structures are equivalent and contribute equally to the resonance hybrid, illustrating the delocalization of the pi electrons across the molecule.

The Number of Resonance Structures for the Nitrate Ion That