Scope 

Transition metals are d block's element that creates compounds in which electrons from d orbitals are ionized or else involved in bonding. Usual transition metal characteristics involve: the probability of variable oxidation states; compounds along with spectroscopic, magnetic or structural features resultant from partially occupied d orbitals; an wide range of organometallic and complexes compounds involving ones with extremely low oxidation state (zero or even negative); and helpful catalytic properties displayed through metals and through solid or molecular compounds. Diverse transition metals show these features to dissimilar degrees, but jointly the properties form a adequately coherent pattern that the elements are best dealt with through the med Topics rather than individually or as groups.

Even though formally part of the d block, the elements of group 12 do not depict typical transition metal characteristics, like the d orbitals are very tightly bound to be included in chemical bonding. These elements are better considered as posttransition metals.