MHT CET · Chemistry · Structure of Atom
Identify the element from following having six unpaired electrons in observed electronic configuration?
- A \(\mathrm{Cu}\)
- B \(\mathrm{Zn}\)
- C \(\mathrm{Cr}\)
- D \(\mathrm{Ti}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Cr}\)
Step-by-step Solution
Detailed explanation
Chromium (Cr):
Expected electronic configuration: \([\mathrm{Ar}] 3 \mathrm{~d}^4 4 \mathrm{~s}^2\) Observed electronic configuration: \([\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1\) Hence, number of unpaired electrons in observed electronic configuration is 6 .
Expected electronic configuration: \([\mathrm{Ar}] 3 \mathrm{~d}^4 4 \mathrm{~s}^2\) Observed electronic configuration: \([\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1\) Hence, number of unpaired electrons in observed electronic configuration is 6 .
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