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AP EAMCET202018 Sep 2020Evening ShiftChemistryd and f Block ElementsActual

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?

Options

  1. A1
  2. B3
  3. C4
  4. D7

Correct answer

B. 3

Step-by-step solution

Ground state electronic configuration of the element ( ( Co , Z=27) ) will be ([ Ar ] 3 d^7 4 s^2 ).

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