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(C) The electronic configuration of $Li$ is $1s^2 2s^1$. Total electrons in $Li_2^+$ is $3+3-1 = 5$. The configuration is $\sigma 1s^2, \sigma^* 1s^2,

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Both are stable

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(C) The electronic configuration of $Li$ is $1s^2 2s^1$. Total electrons in $Li_2^+$ is $3+3-1 = 5$. The configuration is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^1$. Bond order = $\frac{1}{2}(N_b - N_a) = \frac{1}{2}(3 - 2) = 0.5$.Total electrons in $Li_2^-$ is $3+3+1 = 7$. The configuration is $\sigma 1s^2, \sigma^* 1s^2, \sigma 2s^2, \sigma^* 2s^1$. Bond order = $\frac{1}{2}(4 - 3) = 0.5$.Since both have a positive bond order,both are stable.

According to molecular orbital theory,which of the following is true with respect to $Li_2^+$ and $Li_2^-$?

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