The calculated magnetic moment (in Bohr magnetons of Cu ²⁺ ion is)

Step-by-step solution

Electronic configuration of Cu ²⁺ is 1 s^2, 2 s^2, 2 p^6, 3 s^2, 3 p^6, 3 d^9 (because 2 e⁻ goes from 4 s orbital) Number of unpaired electrons =1 aligned Magnetic moment & = n(n+2) & = 1(1+2) & = 3 =1.732 aligned