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The d-And-f-Block Elements
Question
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Give example and suggest reasons for the following features of the transition metal chemistry:
The highest oxidation state is exhibited in oxoanions of a metal.

Answer

The highest oxidation state of transition element is seen in oxides and these oxides are acidic in nature. These acidic oxides dissolve in base and form oxoanions of transition metal. Thus oxoanions of transition element show highest oxidation state of transition metal. Examples are:
The highest oxidation state of Cr is +6 and it is observed that in its oxo-anion, CrO42–(chromate ion) and Cr2O72– (dichromate ion).

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Some More Questions From The d-And-f-Block Elements Chapter

Actinoid contraction is greater from element to element than lanthanoid contraction. Why?

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d10 4s1, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

Why are transition elements known as d-block elements?

Write the general electronic configuration of d-block elements.