Q. Which of the following pair will have effective magnetic moment equal?
A) $Ti^{2 +}$ and $V^{2 +}$
B) $Cr^{2 +}$ and $Fe^{2 +}$
C) $Cr^{3 +}$ and $Mn^{2 +}$
D) $V^{2 +}$ and $Sc^{3 +}$
Explanation
(b)
$Cr^{2 +}$ and $Fe^{2 +}$
$Cr^{2 +} - 3d^{4}$
[table] $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ | [/table]
(4 unpaired electrons)
$Fe^{2 +} - 3d^{6}$
[table] ⥮ | $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ | $\upharpoonleft$ [/table]
(4 unpaired electrons)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.