The number of antibonding electron pairs in `O_(2)^(2-)` molecular ion on the basic of molecular orbital theory is

Options

A. 5
B. 2
C. 4
D. 6

Answer

C

Explanation

Total number of electrons in `O_2^(2-)` =16+2=18
According to MOT, the configuration of `O_2^(2-)` is `sigma1s^2 , overset***sigma1s^2, sigma2s^2 , overset***sigma2s^2, sigma2p_x^2, pi2p_y^2~~pi2p_z^2,overset***2p_y^2~~overset***pi2p_z^2`
So, the number of antibonding electron pairs =4