Stability of the species Li2, Li2¯ and Li2+ increases in the order of:

Engineering

Chemistry

Molecular Orbital Theory or MOT

Question

Stability of the species Li₂, Li₂¯ and Li₂⁺ increases in the order of:

Li₂ < Li₂⁺ < Li₂¯

Li₂¯ < Li₂ < Li₂⁺

Li₂ < Li₂¯ < Li₂⁺

Li₂¯ < Li₂⁺ < Li₂

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Li₂ has configuration $σ$ (1s)² < $σ$ * (1s)² < $σ$ (2s)²

$∴$ Bond order of Li₂ = 1

Bond order of ${Li}_{2}^{+} = \frac{1}{2}$

Bond order of ${Li}_{2}^{-} = \frac{1}{2}$ (has greater number of antibonding electrons as compare to Li₂⁺ stability a bond order)