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Classification Of Elements And Periodicity In Properties

Question
CBSEENCH11005456

Enlist the important characteristics of transition elements (or d-block elements) ?

Solution

The important charateristics of transition elements:
(i) These elements are divided into four transition series each marking the filling of 3d, 4d, 5d and 6d orbitals respectively.
(ii) They are hard and brittle metals having high melting and boiling points.
(iii) They are good conductors of heat and electricity.
(iv) They show variable oxidation states.
(v) They are generally paramagnetic due to the presence of unpaired electrons.
(vi) They form coloured ions.
(vii) These elements have a strong tendency to form complexes.
(viii) Most of the transition elements (Mn, Co, Ni, Cr) and their compounds are used as catalysts.