MCQ
Number of unpaired electrons in $M{n^{4 + }}$ is
- ✓$3$
- B$5$
- C$6$
- D$4$
✓
Answer
Correct option: A.
$3$
a
$Mn ^{4+}$ has electronic configuration $[ Ar ] \,3 d ^3$
$Mn ^{4+}$ has electronic configuration $[ Ar ] \,3 d ^3$
The three $d$ electrons will be unpaired according to Hund's rule of maximum multiplicity.
Hence, number of unpaired electrons in $M n^{4+}(Z=25)$ is $3.$
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