Question

Spin magnetic moment of Xn+ (Z = 26) is √24 B.M. Hence number of unpaired electrons and value of n respectively are :

(A) 4, 2

(B) 2, 4

(C) 3, 1

(D) 0, 2

Answer 1

Correct Answer is: (A) 4, 2

Magnetic moment = √n(n + 2) = √24 B.M.

∴ No. of unpaired electron = 4.

X26 : 1s2 2s22p63s23p63d64s2.

To get 4 unpaired electrons, outermost configuration will be 3d6 .

∴ No. of electrons lost = 2 (from 4s2 ).

∴ n = 2.