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The D-And-f-Block Elements

Question

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The lanthanide contraction is responsible for the fact that

Zr and Y have about the same radius

Zr and Nb have similar oxidation state

Zr and Hf have about the same radius

Zr and Zn have the same oxidation

Solution

C.

Zr and Hf have about the same radius

Due to Lanthanide contraction.

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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