Which one is diamagnetic ?

1.	Which one is diamagnetic ?
Answer» `H_(2)^(-)` `H_(2)^(+)` `H_(2)` `He_(2)^(+)` SOLUTION :`H_(2)` Molecule/ion`H_(2)^(-) "" H_(2)^(+) "" H_(2) "" He_(2)^(+)` TOTAL `E^(-) " no. " "3123 " ` ODD No. Odd No. Even No. Odd No. only `H_(2)` Has even ELECTRON so, `H_(2)` is diamagnetic

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