Among the following species N 2 , N 2 + , N 2 - , N 2 2 - , O 2 , O 2 + , O 2 - , O 2 2 - the number of species showing diamagnetism is

Step-by-step solution

The molecules with unpaired electrons are paramagnetic and molecules with all electrons paired are diamagnetic. In general molecules with an even number of electrons (except 10 and 16 electrons) are diamagnetic N 2 14 e -   diamagnetic N 2 + 13 e -   paramagnetic   N 2 - 15 e - paramagnetic N 2 2 - 16 e -   paramagnetic O 2 16 e - paramagnetic O 2 + 15 e - paramagnetic O 2 - 17 e - paramagnetic O 2 2 - 18 e - diamagnetic