The nitrite ion (NO2-) is shown in two resonance structures. In each, one N-O bond is single and the other is double.
The actual nitrite ion has:
- Acheck_circle
Two equivalent N-O bonds with bond order 1.5
- B
Two different N-O bond lengths
- C
Three equivalent bonds of order 1.33
- D
One single and one double bond, frozen in place
Explanation
Resonance averages the structures: both N-O bonds are equivalent with bond order 1.5.