Question

Among $V(Z=23)$, $Cr(Z=24)$, $Mn(Z=25)$ and $Fe(Z=26)$, which will have the highest magnetic moment?

• A. $V$
• B. $Cr$
• C. $Mn$
• D. $Fe$

Answer 1

Answer: (B)

$Cr$

$V$,$Cr$,$Mn$ and $Fe$ has three, six, five and four unpaired $e^{-}$ respectively.

So, $M_V=\sqrt{3(3+2)}=\sqrt{15}=3.18$ BM

$M_{Cr}=\sqrt{6(6+2)}=\sqrt{48}=6.92$ BM

$M_{Mn}=\sqrt{5(5+2)}=\sqrt{35}=5.91$ BM

$M_{Fe}=\sqrt{4(4+2)}=\sqrt{24}=4.89$ BM

So, $Cr$ is having highest magnetic moment. It can be concluded that more is the number of unpaired $e^{-}s$, higher is the magnetic moment.