The pair of lanthanides in which | d and f Block Elements

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JEE MAIN 2023

13-04-2023 S1

Question

The pair of lanthanides in which both elements have high third -ionization energy is:

Select the correct option:

Eu, Gd

Eu, Yb

Lu, Yb

Dy, Gd

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Sol. $\left.\left\lvert\, \begin{array}{l}\mathrm{Eu}^{+2}:[\mathrm{Xe}] 4 \mathrm{f}^7 \\ \mathrm{Yb}^{+2}:[\mathrm{Xe}] 4 \mathrm{f}^{14}\end{array}\right.\right\}$ High IE due to half-filled and fully filled configurations

Question Tags

JEE Main

Chemistry

Medium

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