How many unpaired electrons will be present in the ground state of an atom which has valence electronic…

How many unpaired electrons will be present in the ground state of an atom which has valence electronic configuration \(3 d^6\) in its +3 oxidation state?
  1. 1
  2. 3
  3. 4
  4. 7

Solution

Ground state electronic configuration of the element (\(\mathrm{Co}, Z=27)\) will be \([\mathrm{Ar}] 3 d^7 4 s^2\).
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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