Transition Elements: Definition and Properties.

Definition:

Transition elements may be defined as those elements which have partially filled d or f sub-shells in atomic state or in any of their commonly occurring oxidation states.

Properties of Transition Elements

Because of similar electronic configuration, the d-block elements closely resemble one another in their physical and chemical properties.

Some of the points of their resemblance are given below.

  1. They are all metals in true sense, some of which play important role in industry, e.g. Ti, Fe, Cr, Ni, Cu, Mo, W, Zr, Nb, Ta, Th, etc.
  2. They are all hard and strong metals with high melting and boiling points. They are also good conductors of heat and electricity.
  3. They form alloys with one another and also with other elements.
  4. With few exceptions, they show variable valency or oxidation state.
  5. Their ions and compounds are colored in solid state as well as in solution formed at least in one if not all the oxidation states.
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Fawad's Chemistry

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