The elements of inner transition elements differ from, transition having just one difference that transition have single d-orbital in their shells, but the inner transition elements have two or more d- orbital so they are more complex and tough to study . Hence they are distinguished. co-ordination compounds are result of the lone pairs in the d-orbitals only. o.k. nothing else. Solution The elements of inner transition elements differ from, transition having just one difference that transition have single d-orbital in their shells, but the inner transition elements have two or more d- orbital so they are more complex and tough to study . Hence they are distinguished. co-ordination compounds are result of the lone pairs in the d-orbitals only. o.k. nothing else..