d - block and f - block Elements
Separation of lanthanides from their mixture is not easy because of:
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Single Choice
What is the expression for the covalent radius of the following? Zr _____ Hf
A$$Zr \simeq Hf$$
Correct Answer
B$$Zr < Hf$$
C$$Zr > Hf$$
DNone of these
Solution
The covalent radius, is a measure of the size of an atom that forms part of one covalent bond. Zirconium $$Zr$$ (atomic number 40) and hafnium $$Hf$$ (atomic number 72) belongs to same group but both have almost equal covalent size due to lanthanoid contraction.
SIMILAR QUESTIONS
d - block and f - block Elements
Which of the following statements is not correct?
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
Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii?
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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