Question

(b) (i) The electronic configuration of Ce is: ₅₈Ce = [Xe]⁵⁴ 4f¹ 5d¹ 6s² Calculate the spin only magnetic moment of Ce³⁺ ion. (ii) Why is copper regarded as a transition element although copper atom has completely filled d-orbitals in its ground state? (iii) Why is Sc³⁺ colourless in aqueous solution whereas Ti³⁺ is coloured?