The Most Rapid Essay Writing Service For Your Academic Success

The bond lengths in the hybrid should be an average of the bond lengths in the separate contributors.
Consider for example the nitrite ion NO. It has two resonance contributors.
The resonance hybrid has two identical N-O bonds. They share a double bond and a single bond between them so the average bond order is 1.5.
We would predict that the N-O bond length should be halfway between a single bond and a double bond.
The N-O single bond length is 136 pm. The N=O double bond length is 115 pm.
The average of these bond lengths is 126 pm.
The observed bond length in NO is 125 pm.