Magnetic Moment

Concept: The spin-only magnetic moment of a transition metal ion is calculated using the formula: where:

• = number of unpaired electrons
• = Bohr Magneton

Step 1: {Write the electronic configuration of Mn.} Atomic number of Mn = 25
Step 2: {Determine the configuration of .} Two electrons are removed first from the orbital:
Step 3: {Count the number of unpaired electrons.} In , each orbital contains one electron according to Hund's rule.
Step 4: {Substitute in the magnetic moment formula.}