Question

Magnetic moments of $V(Z=23),Cr(Z=24)$ and $Cu(Z=29)$ are x,y and z respectively, then which of the following is correct?

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

Answer 1

The correct option is B $y>x>z$

$V(z=23)\left[Ar\right]{3d}^3\to n=3$

$Cr(z=24)\left[Ar\right]{4s}^1{3d}^5\to n=6$

$Cu(z=29)\left[Ar\right]{4s}^1{3d}^{10}\to n=1$

where n= no. of unpaired electrons

So, $y>x>z$

Hence, the correct option is $B$