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Problem: Which of the molecules or ions below will have the shortest nitrogen-oxygen bond?a. NO+b.NO2- c. NO3-

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We are asked to determine the shortest nitrogen-oxygen bond among NO+NO2- and NO3-


We can use Bond Order to determine the length of a bond. Remember that the higher the bond order, the stronger the bond and therefore, the shorter the bond.


Let us draw the Lewis structures of each and its resonance structures and calculate for the average bond order of an N-O bond in all three molecules or ions. We must take note that the bond order of a molecule is the number of bonds between a pair of atoms. The formula we are going to use is:



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Problem Details

Which of the molecules or ions below will have the shortest nitrogen-oxygen bond?

a. NO+

b.NO2- 

c. NO3-

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Bond Energy concept. If you need more Bond Energy practice, you can also practice Bond Energy practice problems.