Which pair of elements from following has half filled d-orbital in observed electronic configuration?
Which pair of elements from following has half filled d-orbital in observed electronic configuration?
Cu and Mn
Mn and Cr
Zn and Co
Cu and Zn
Solution
The elements which have half-filled d-orbital in their observed electronic configuration are:
$\operatorname{Mn}(\mathrm{Z}=25)$ : $[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^2$ and $\mathrm{Cr}(\mathrm{Z}=24):[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1$