D And F Block Elements

Step 1: Understanding the Concept:
Magnetic moment ( ) depends on the number of unpaired electrons present in the ion.
It is calculated using the spin-only formula:
where = number of unpaired electrons.
Step 2: Electronic Configuration and Unpaired Electrons:
:}
Electronic configuration of Zn =
For :
Unpaired electrons = 0
:}
Electronic configuration of Fe =
For :
Unpaired electrons = 4
:}
Electronic configuration of Co =
For :
Unpaired electrons = 3
:}
Electronic configuration of Ni =
For :
Unpaired electrons = 2
Since has the maximum number of unpaired electrons (4), it will have the maximum magnetic moment.
Step 3: Final Answer:
The magnetic moment will be maximum for }.