Assuming `2s, 2p` mixing is NOT operative , the paramagnetic species among the following is

Options

A. `Be_(2)`
B. `B_(2)`
C. `C_(2)`
D. `N_(2)`

Answer

c

Explanation

as it has two unpaired electrons
`Be_(2) = sigma 1s^(2), sigma**1s^(2) sigma2s^(2)sigma **2s^(2)`
`B_(2) = sigma 1s^(2), sigma ** 1s^(2), sigma 2s^(2), sigma** 2s^(2), sigma 2p_(z)^(2)`
`C_(2) = sigma 1s^(2), sigma ** 1s^(2), sigma 2s^(2), sigma** 2s^(2), sigma 2p_(z)^(2), pi 2p_(x)^(1)`
`N_(2) = sigma 1s^(2), sigma ** 1s^(2), sigma 2s^(2), sigma** 2s^(2), sigma 2p_(z)^(2), pi ** 2p_(x)^(2) pi 2p_(y)^(2)`