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The D-And-f-Block Elements

Question
CBSEENCH12007145
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Mention the direct consequence of the following factors on the chemical behaviour of the transition elements.
(i) They have in completely filled d-orbitals in the ground state or in one of the oxidised states of their atoms.
(ii) They contribute more valence electrons per atom in the formation of metallic bonds?

Solution

(i) The element which is completely filled d- orbital in the ground state or in the oxidised state can show these properties:
(a) They can form complex compounds.
     (b) They show variable oxidation state.
     (c) They are used as catalyst.

(ii) 
(a) They are hard.
     (b) They have high melting and boiling point.
     (c) They have high enthalpy of atomization.
     (d) They are malleable and ductile.

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

Which is a stronger reducing agent Cr2+ or Fe2+ and why?

Explain why Cu+ ion is not stable in aqueous solutions?

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?

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