JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The pair of lanthanides in which both elements have high third-ionization energy is:
- A \(Eu , Gd\)
- B \(Eu , Yb\)
- C \(Lu , Yb\)
- D \(Dy, Gd\)
Answer & Solution
Correct Answer
(B) \(Eu , Yb\)
Step-by-step Solution
Detailed explanation
\(\left.Eu ^{+2}:[ Xe ] 4 f ^7\right\}\) High IE due to half \(\left.Yb ^{+2}:[ Xe ] 4 f ^{14}\right\}\) filled \& fully filled configurations
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