AP EAMCET · Chemistry · d and f Block Elements
The number of \(\mathrm{d}\) - electrons in \(\mathrm{Cr}^{3+}\) ion \((\mathrm{Z}=24)\) is
- A \(6\)
- B \(4\)
- C \(3\)
- D \(8\)
Answer & Solution
Correct Answer
(C) \(3\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Cr}=[\mathrm{Ar}] 3 \mathrm{~d}^5 4 \mathrm{~s}^1\) so \(\mathrm{Cr}^{3+}=[\mathrm{Ar}] 3 \mathrm{~d}^3\) \(\Rightarrow \quad\) Number of d-electrons \(=3\)
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