Identify the element having the highest first | vedclass

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

Question

(D) The first ionisation enthalpy $(IE_1)$ of lanthanoids generally increases with an increase in atomic number due to the lanthanoid contraction,whic

Vedclass · Accepted Answer

$Yb$

Vedclass · Answer

(D) The first ionisation enthalpy $(IE_1)$ of lanthanoids generally increases with an increase in atomic number due to the lanthanoid contraction,which leads to a decrease in atomic size and stronger attraction of the nucleus for the valence electrons. Among the given elements,$Ce$ $(Z=58)$,$La$ $(Z=57)$,$Gd$ $(Z=64)$,and $Yb$ $(Z=70)$,the element $Yb$ has the highest atomic number. $Yb$ has a stable electronic configuration of $[Xe] 4f^{14} 6s^2$. Due to the completely filled $4f$ subshell and the highest effective nuclear charge among the options,it requires the most energy to remove the first electron. Therefore,$Yb$ has the highest $IE_1$.

Identify the element having the highest first ionisation enthalpy $(IE_1)$ from the following.

Similar Questions

What is the general electronic configuration for the $2^{nd}$ row transition series?

In what way is the electronic configuration of the transition elements different from that of the non-transition elements?

Which of the following is a transition element?

Which element from the following does $NOT$ exhibit a spin-only magnetic moment in the $+3$ oxidation state?

The most stable oxidation state of $Mn$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module