Problem: Use the molecular orbital diagram shown to determine which of the following is most stable.a. F22+b. Ne22+c. F22-d. O22+e. F2

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

FREE Expert Solution

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 → more stable


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*)


a. F22+

            Group            Valence Electrons
F        7A                   2 × 7 e14 e
From +2 charge:        – 2 e
                                 Total:  12 valence e

Bond Order=12[8-4]

Bond Order = 2.0



b. Ne22+

          Group            Valence Electrons
Ne      8A                   2 × 8 e16 e
From +2 charge:        – 2 e
                                 Total:  14 valence e


Bond Order=12[8-6]

Bond Order = 1.0



c. F22-

            Group            Valence Electrons
F        7A                   2 × 7 e14 e
From charge:        +2 e
                                 Total:  16 valence e

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Problem Details

Use the molecular orbital diagram shown to determine which of the following is most stable.

a. F22+

b. Ne22+

c. F22-

d. O22+

e. F2

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

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