MHT CET · Chemistry · d and f Block Elements
Which pair of elements from following has half filled d-orbital in observed electronic configuration?
- A Cu and Mn
- B Mn and Cr
- C Zn and Co
- D Cu and Zn
Answer & Solution
Correct Answer
(B) Mn and Cr
Step-by-step Solution
Detailed explanation
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 \(\mathrm{Cr}(\mathrm{Z}=24):[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1\)
\(\operatorname{Mn}(\mathrm{Z}=25)\) : \([\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^2\) and \(\mathrm{Cr}(\mathrm{Z}=24):[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1\)
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