Practice question
Question
The bond order of O₂²⁻ ion, based on molecular orbital theory, is:
Explanation
For O₂²⁻ (18 electrons): (sigma 1s)² (sigma^* 1s)² (sigma 2s)² (sigma^* 2s)² (sigma 2pz)² (pi 2px)² (pi 2py)² (pi^* 2px)² (pi^* 2py)² . Bonding = 10, antibonding = 8. Bond order = (10 - 8/2) = 1 .
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