Use Hund’s rule to derive the electronic configuration of Ce³+ ion, and calculate its magnetic moment on the basis of ‘spin-only’ formula.
Explanation Hund’s rule of maximum multiplicity explains how the filling of electrons in the orbitals of an atom should be approached. He concluded that all the subshells of an orbital in the same energy level are firstly singly occupied before making them doubly occupied, and the spin of all the electrons in the same energy level should be the same. Electronic configuration of cerium (atomic no. 58).
