All transition elements are d-block elements, but all d-block elements are not transition elements. Explain.


Elements in which the last electron enters in the d-orbitals, are called d-block elements or transition elements. These elements have the general outer electronic configuration (n-1)d1-10ns0-2. Zn, Cd and Hg having the electronic configuration (n-1)d10ns2 do not show most of the properties of transition elements.