Definition of transitionmetal. : any of various metallicelements(such as chromium, iron, and nickel) that have valence electrons in two shells instead of only one. — called alsotransitionelement.Many scientists describe a "transition metal" as anyelementin the d-block of the periodic table, which includes groups 3 to 12 on the periodic table. In actual practice, the f-block lanthanide and actinideseriesare also consideredtransition metalsand are called "innertransition metals".

Transition series :The set / collection of transition metals is called transition series .

Definition - What does Transition Metals mean?

Transition metals are metals that possess unique and useful properties, mostly consisting of d-block transition elements in the periodic table.

There are about 56 transition elements that are subdivided into three main groups:

Main transition elements or d block elements (DBE)

Lanthanides elements

Actinides elements

Explains Transition Metals

Transition metals have incomplete inner electron shells that serve as transitional links between the most and the least electropositive in a series of elements. They are characterized by:

Multiple valences

Colored compounds

Ability to form stable complex ions