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4.Chemical Bonding and Molecular Structure
medium
During change of $O_2$ to $O_2^-$ ion, the electron adds on which one of the following orbitals?
A
$\pi ^*$ orbital
B
$\pi$ orbital
C
$\sigma ^*$ orbital
D
$\sigma$ orbital
(AIPMT-2012)
Solution
configuration of $O_{2}^{-}$ is
$K K \sigma(2 s)^{2} \sigma^{*}(2 s)^{2} \sigma(2 p z)^{2} \pi(2 p x)^{2} \pi(2 p y)^{2} \pi^{*}(2 p x)^{2} \pi^{*}(2 p y)^{1}$
Standard 11
Chemistry
