Single Choice

Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii?

AZr (40) and Hf (72)
Correct Answer
BZr (40) and Ta (73)
CTi (22) and Zr (40)
DZr (40) and Nb (41)

Solution

Because of lanthanoid contraction, $$Zr (40)$$ and $$Hf (72)$$ have nearly same atomic radii.

$$\text{Element}$$ $$\text{Radius (ppm)}$$
Zr (40)
145
Hf (72)
144
Ta (73)
134
Ti (22)
132
Nb (41)
134

Hence, option $$A$$ is correct.

SIMILAR QUESTIONS

d - block and f - block Elements

Separation of lanthanides from their mixture is not easy because of:

d - block and f - block Elements

Which of the following statements is not correct?

d - block and f - block Elements

What is the expression for the covalent radius of the following? Zr _____ Hf

d - block and f - block Elements

Reason of lanthanoid contraction is:

d - block and f - block Elements

The extent of actinoid contraction is greater than lanthanoid contraction explain.

d - block and f - block Elements

The pair that has similar atomic radii is :

d - block and f - block Elements

The most basic hydroxide from following is?

d - block and f - block Elements

What is meant by lanthanoid contraction? The actinoid contraction is grater than that of lanthanoid contraction. Why ?

d - block and f - block Elements

The separation of Lanthanoid elements is difficult. Explain.

d - block and f - block Elements

Which of the following factor may be regarded as the main cause of lanthanide contradiction?

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