Question

Magnetic moments of $Cr(Z=24)$, $Mn(Z=25)$ and $Fe(Z=26)$, are $x,y,z$.

They are in order:

• A. $x<y<z$
• B. $x=y<z$
• C. $x>y>z$.
• D. $x=y=z$

Answer 1

The correct option is C $x>y>z$.

n = number of unpaired electrons. Greater the number of unpaired electrons, greater will be the magnetic moment.

$Cr$ = 6 unpaired electron

$Mn$ = 5 unpaired electron

$Fe$ = 4 unpaired electron

.

Therefore the order of magnetic moment is $x>y>z$.

Hence,option C is correct.