Which of the following pair have similar magnetic moment?
Answer & explanation
Correct answer: option 3
Magnetic moment is given by \(\mu\) = \(\sqrt {n(n+2) }\) ; where n is the number of electrons
Same no of electrons will give same magnetic moment.
25Mn : [Ar]4s23d5
Mn2+ : [Ar]3d5
26Fe : [Ar]4s23d6
Fe3+ : [Ar]3d5
Both contain 5 unpaired electrons, Hence they possess same magnetic moment.