What is the value of spin only magnetic moment for Cu^ 2+ in BM

MHT CET 2026 Chemistry question

What is the value of spin only magnetic moment for in BM

(A)2.84
(B)3.87
(C)1.73Correct
(D)0.0

Answer: (C)

Solution

Copper has Z = 29 with configuration . loses the 4s electron and one 3d electron, giving . A ion has 9 electrons in five orbitals, so exactly one unpaired electron (n = 1). Spin-only magnetic moment \sqrt{n(n+2)}$ =

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Question ID VK-098608