Problem: Use the drawing of MO energy diagram to predict the bond order of Be2+ and Be2–. Do you expect Be2– to exist in the gas phase?

🤓 Based on our data, we think this question is relevant for Professor Poehlmann & Waymouth's class at STANFORD.

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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*). 


For Be2+:

            Group             Valence Electrons

Be         2A                   2 × 2 e4 e

+1 charge                                  – 1 e    



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Problem Details

Use the drawing of MO energy diagram to predict the bond order of Be2+ and Be2. Do you expect Be2 to exist in the gas phase?

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 Order concept. If you need more Bond Order practice, you can also practice Bond Order practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Poehlmann & Waymouth's class at STANFORD.