MCQ
Identify the element for which electronic configuration in $+3$ oxidation state is $[\mathrm{Ar}] 3 \mathrm{~d}^{5}$ :
- A$\mathrm{Ru}$
- B$Mn$
- C$Co$
- ✓$\mathrm{Fe}$
✓
Answer
Correct option: D.
$\mathrm{Fe}$
d
$\mathrm{Fe}^{3+}[\mathrm{Ar}] 3 \mathrm{~d}^{5}$
$\mathrm{Fe}^{3+}[\mathrm{Ar}] 3 \mathrm{~d}^{5}$
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