Which of the following pairs has the same siz | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) In general,the atomic and ionic radii increase on moving down a group. However,the elements of the second transition series $(Zr, Nb, Mo, \dots)$

Vedclass · Accepted Answer

$Zr^{4+}, Hf^{4+}$

Vedclass · Answer

(C) In general,the atomic and ionic radii increase on moving down a group. However,the elements of the second transition series $(Zr, Nb, Mo, \dots)$ have almost the same radii as the elements of the third transition series $(Hf, Ta, W, \dots)$. This phenomenon is due to lanthanoid contraction,which arises from the imperfect shielding of one $4f$ electron by another,leading to a smaller increase in size than expected when moving from the $4d$ to the $5d$ series. Therefore,$Zr^{4+}$ and $Hf^{4+}$ have nearly identical ionic radii.

Which of the following pairs has the same size?

Similar Questions

Which of the following ions is colourless in spite of the presence of unpaired electrons?

Compare the stability of the $+2$ oxidation state for the elements of the first transition series.

The set that contains the atomic numbers of only transition elements is -

Write a brief note on the electronic configurations of the transition elements.

Which of the following ions indicates the maximum magnetic moment?

Vedclass Test Series

Exam Paper Generator

Online Exam Module