Higher second ionisation enthalpies than expe | vedclass

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

Question

(D) The electronic configuration of $Cr$ is $[Ar] 3d^5 4s^1$ and that of $Cu$ is $[Ar] 3d^{10} 4s^1$. Their second ionisation enthalpies are higher th

Vedclass · Accepted Answer

$Cr, Cu$

Vedclass · Answer

(D) The electronic configuration of $Cr$ is $[Ar] 3d^5 4s^1$ and that of $Cu$ is $[Ar] 3d^{10} 4s^1$. Their second ionisation enthalpies are higher than expected because after the removal of one electron,$Cr^+$ attains a stable half-filled $3d^5$ configuration,and $Cu^+$ attains a stable fully-filled $3d^{10}$ configuration. These configurations are significantly more stable than the configurations of their neighbors. Therefore,it requires much more energy to remove the second electron from these ions. Thus,option $(D)$ is correct.

Higher second ionisation enthalpies than expected are observed for

Similar Questions

Which of the following ionic species will impart colour to an aqueous solution?

Which one of the following ions exhibits the highest magnetic moment?

The ability of transition metal ions to form complex compounds is due to:

Which one of the following is an example of non-$typical$ transition elements?

Which of the following pairs of species has the same electronic configuration?

Vedclass Test Series

Exam Paper Generator

Online Exam Module