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The D-And-f-Block Elements

Question
CBSEENCH12007174
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What are the inner transition elements? Decide which of the following atomic numbers at the atomic numbers of the inner transition elements: 29, 59, 74, 95, 102, 104?

Solution

Inner transition metal are those element in which the last electron enters the f- orbital.
The element in which the 4f and 5f orbital are progressively filled are called f- block element.
The f-block elements are called inner transition elements. They consist of two series lanthanoids series having elements with atomic number form 57 to 71 and actinoid series having elements with atomic number from 89 to 103.
Hence, the elements with atomic number 59, 95 and 102 are inner transition elements and rest of them are not.

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

Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?

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.

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