Question

The number of unpaired electrons in $M{n}^{4+}$(Z=25) is

• A. Four
• B. Two
• C. Five
• D. Three

Answer 1

The correct option is D Three

$M{n}^{4+}$ has electronic configuration $\left[Ar\right]3d^3$
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