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Which of the following has maximum number of unpaired d-electrons
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Correct option is B
Zn = Z= 30 , Electronic configuration - ( Ar ) 4s2 3d 10 , number of unpaired d-electrons = 0
Fe = Z = 26 , Electronic configuration - ( Ar ) 4s2 3d 6
Fe +2 electronic configuration - ( Ar ) 4s0 3d 6,number of unpaired d-electrons = 4
Ni = Z = 28 , Electronic configuration - ( Ar ) 4s2 3d 8
Ni +3 = Electronic configuration - ( Ar ) 4s0 3d7,number of unpaired d-electrons = 3
cu+ =Z= 29 , Electronic configuration - ( Ar ) 4s0 3d10,number of unpaired d-electrons = 0
Fe +2 contains maximum number of unpaired d-electrons.
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