11th Class Chemistry The s-Block Elements

  • question_answer 1) Why is \[K{{O}_{2}}\] paramagnetic?

    Answer:

    The superoxide \[O_{2}^{-}\] is paramagnetic because of one unpaired electron in \[{{\pi }^{*}}2p\] molecular orbital. \[KK\sigma {{(2s)}^{2}}{{\sigma }^{*}}{{(2s)}^{2}}\sigma {{(2{{p}_{x}})}^{2}}\pi {{(2{{p}_{x}})}^{2}}{{(\pi 2{{p}_{y}})}^{2}}{{\pi }^{*}}{{(2{{p}_{x}})}^{2}}{{\pi }^{*}}{{(2{{p}_{y}})}^{1}}\]  

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