Which molecular out of the following does not contain unpaired electro

1.	Which molecular out of the following does not contain unpaired electrons ?
Answer» `N_(2)^(+)` `O_(2)` `O_(2)^(2-)` `B_(2)` SOLUTION :`N_(2)^(+) = KK sigma_(2S)^(2) sigma_(2s)^(2) pi_(2_(p_(x)))^(2) pi_(2_(p_(y)))^(2) sigma_(2_(p_(z)))^(1)` `O_(2) = KK sigma_(2s)^(2) sigma_(2s)^(2) sigma_(2p_(z))^(2) pi_(2_(p_(x)))^(2) pi_(2_(p_(y)))^(2)pi_(2_(p_(x)))^(1)pi_(2_(p_(y)))^(1) ` `O_(2)^(2-) = KK sigma_(2s)^(2) sigma_(2s)^(2) sigma_(2p_(z))^(2) pi_(2_(p_(x)))^(2) pi_(2_(p_(y)))^(2)pi_(2_(p_(x)))^(2)pi_(2_(p_(y)))^(2) ` `B_(2) = KK sigma_(2s)^(2) sigma_(2s)^(2)pi_(2_(p_(x)))^(1)pi_(2_(p_(y)))^(1) ` thus , `O_(2)^(2-)`has no unpaired electrons.

Discussion