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  • Which among the following has maximum number of unpaired electrons?Option: 1 <img alt="\mathrm{Mg^{2+}}" src="/latex-image/?%5Cmathrm%7BMg%5E%7B2&amp

Which among the following has maximum number of unpaired electrons?

Option: 1

\mathrm{Mg^{2+}}


Option: 2

\mathrm{Fe^{2+}}


Option: 3

\mathrm{Cu^{+}}


Option: 4

\mathrm{V^{3+}}


Answers (1)

best_answer

\mathrm{Mg^{2+} = 1s^{2} 2s^{2} 2p^{6} =} no unpaired electron

\mathrm{Fe^{2+}= 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{6} =} four unpaired electrons

\mathrm{Cu^{+}= 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} = } no unpaired electron

\mathrm{V^{3+} = 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} = } two unpaired electrons

Hence option 2 is correct.

Posted by

Ritika Kankaria

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