Problem: Place the species B2+, B2, and B2- in order of increasing bond length and increasing bond energy.

🤓 Based on our data, we think this question is relevant for Professor Castaneda's class at UMICH.

FREE Expert Solution

We’re being asked to rank the given species in order of increasing bond length and increasing bond energy.


Recall that the bond order tells us the strength and length of a bond: a higher bond order means the bond is stronger and shorter.

higher bond orderhigher bond strength → shorter bond length → higher bond energy


We can calculate for the bond order using:

Bond Order=12[# of e- in bonding MO-# of e- in antibonding MO]

bonding MOs → without an asterisk (e.g., σ1s)
antibonding MOs those with an asterisk (e.g., σ1s*). 


To do so, we need to look at the molecular orbital (MO) diagram of each molecule. Recall that we have two types of MO diagrams:

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Problem Details

Place the species B2+, B2, and B2- in order of increasing bond length and increasing bond energy.

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 Homonuclear Diatomic Molecules concept. If you need more Homonuclear Diatomic Molecules practice, you can also practice Homonuclear Diatomic Molecules practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Castaneda's class at UMICH.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl 2nd Edition practice problems.