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

Step-by-step solution

The atomic number of Cu is 29 . The electronic configuration of Cu is [ Ar ] 3d¹⁰ 4s¹ . The electronic configuration of Cu ²⁺ is [ Ar ] 3d⁹ . The number of unpaired electrons in Cu ²⁺ is n = 1 . The spin only magnetic moment is given by = n(n+2) BM . Substituting n = 1 , we get = 1(1+2) = 3 1.73 BM . Answer: 1.73