The pair of lanthanides in which both elements have high third-ionization energy is: (A) Eu, Yb (B) — JEE Mains Chemistry Past Papers Chemistry Question
Question
The pair of lanthanides in which both elements have high third-ionization energy is: (A) Eu, Yb (B) Eu, Gd (C) Dy, Gd (D) Lu, Yb
Answer: A
💡 Solution & Explanation
Element Electronic configuration Europium (Eu) [Xe] 4f76s2 Gadolinium (Gd) [Xe] 4f75d16s2 Dysprosium (Dy) [Xe] 4f106s2 Ytterbium (Yb) [Xe] 4f146s2 Lutetium (Lu) [Xe] 4f145d16s2 | JEE(Main) 2023 | DATE : 13-04-2023 (SHIFT-1) | PAPER-1 | OFFICIAL | CHEMISTRY PAGE # 3
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