Which of the following species is expected to show the highest magnetic moment? (At. Nos.: Cr = 24, Mn = 25, Co = 27, Ni = 28, Cu = 29)
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a
Cr2+
b
Cu2+
c
Mn2+
d
Co2+
answer is C.
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Detailed Solution
Highest magnetic moment depends upon number of unpaired electron sinceCr2+=3d44s0,Mn2+=3d54s0Cu2+=3d94s0,Co2+=3d74s0,Ni2+=3d64s0So Mn2+ contain maximum number of unpaired electron i.e. 5.