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Write the molecular orbital configuratio...

Write the molecular orbital configuration of the following species :
` (a) O_2 " " (b)O_(2)^(-) " " (c ) O_(2)^(+) " "(d) O_(2)^(2+)`
(i) Calculate their bond order.
(ii) Predict their magnetic behaviour.
(iii) Which of these does show highest paramagnetism?

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