MCQ
The electronic configuration of cobalt is
  • A
    $1{s^2},2{s^2}2{p^6}.3{s^2}3{p^6}3{d^1},4{s^2}$
  • $1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^7},4{s^2}$
  • C
    $1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^3},4{s^2}$
  • D
    $1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^5},4{s^2}$

Answer

Correct option: B.
$1{s^2},2{s^2}2{p^6},3{s^2}3{p^6}3{d^7},4{s^2}$
b
It’s Obvious.

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