d - block and f - block Elements
Separation of lanthanides from their mixture is not easy because of:
DoubtBuddy
Single Choice
Which of the following factor may be regarded as the main cause of lanthanide contradiction?
APoor shielding of one of the $$4f$$ electron by another in the subshell.
BEffective shielding of one of the $$4f$$ electrons by another in the subshell
CPoorer shielding of $$5d$$ electrons by $$4f$$ electrons
Correct Answer
DGreater shielding of $$5d$$ electrons by $$4f$$ electrons
Solution
The Lanthanide Contraction is the result of a poor shielding effect of the 4f electrons. The shielding effect is described as the phenomenon by which the inner-shell electrons shield the outer-shell electrons so they are not effected by nuclear charge. So when the shielding is not as good, this would mean that the positively charged nucleus has a greater attraction to the electrons, thus decreasing the atomic radius as the atomic number increases.
SIMILAR QUESTIONS
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
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.
Contact Details
- community@doubtbuddy.in
- M3M Cosmopolitian, Sector 66, Golf Course Extension Road, Gurgaon
- Policy Terms