Number of unpaired electrons in Mn^{2+} is | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The atomic number of $Mn$ is $25$. The electronic configuration of $Mn$ is $[Ar] 3d^5 4s^2$. When $Mn$ forms $Mn^{2+}$ ion,it loses two electrons

Vedclass · Accepted Answer

$5$

Vedclass · Answer

(B) The atomic number of $Mn$ is $25$. The electronic configuration of $Mn$ is $[Ar] 3d^5 4s^2$. When $Mn$ forms $Mn^{2+}$ ion,it loses two electrons from the $4s$ orbital. The electronic configuration of $Mn^{2+}$ becomes $[Ar] 3d^5$. In the $3d$ subshell,there are $5$ orbitals,and according to Hund's rule,each orbital will be singly occupied. Therefore,there are $5$ unpaired electrons in $Mn^{2+}$.

Number of unpaired electrons in $Mn^{2+}$ is

Similar Questions

In the first transition series,the metallic bond strength increases from ..... to .....

Iron loses its magnetic property at:

Which of the following pairs does not consist of isoelectronic species? (Atomic numbers: $Sm = 62, Er = 68, Yb = 70, Lu = 71, Eu = 63, Tb = 65, Tm = 69$)

Which of the following oxides is white but becomes yellow on heating?

$Sc \ (Z = 21)$ is a transition element but $Zn \ (Z = 30)$ is not because

Vedclass Test Series

Exam Paper Generator

Online Exam Module