Which of the following ions possess a spin-only magnetic moment of approximately 2.83 BM ? A. V ³⁺ B. Co ²⁺ C. Ni ²⁺ D. Cu ⁺ E. Mn ³⁺ Choose the most appropriate answer from the options given below.

Step-by-step solution

The spin-only magnetic moment is given by = n(n+2) BM , where n is the number of unpaired electrons. Given 2.83 BM , we have n(n+2) = 2.83 n(n+2) 8 n = 2 . Electronic configuration of V ³⁺ is [ Ar ] 3d^2 . Number of unpaired electrons n = 2 . Electronic configuration of Co ²⁺ is [ Ar ] 3d^7 . Number of unpaired electrons n = 3 . Electronic configuration of Ni ²⁺ is [ Ar ] 3d^8 . Number of unpaired electrons n = 2 . Electronic configuration of Cu ⁺ is [ Ar ] 3d¹⁰ . Number of unpaired electrons n = 0 . Electronic con