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Determine the bond order for the given molecular species based on the following electronic configurations:

1. (a) KKσ2s²σ*2s²σ2p²π2p⁴π*2p²π*2p¹
2. (b) KKσ2s²σ*2s²σ2p²π2p⁴π*2p²π*2p²
3. (c) KKσ2s²σ*2s²σ2p²π2p⁴π*2p¹π*2p²
4. (d) KKσ2s²σ*2s²σ2p²π2p⁴π*2p²π*2p¹

Correct answer: (a) KKσ2s²σ*2s²σ2p²π2p⁴π*2p²π*2p¹

Solution

The bond order is calculated as (number of bonding electrons - number of antibonding electrons)/2. For the given configuration in option (a), the bond order is correctly calculated as 1.5.

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