JEE Main202522 Jan 2025Morning ShiftChemistryd and f Block ElementsActual
Lanthanoid ions with 4 f^7 configuration are : (A) Eu ²⁺ (B) Gd ³⁺ (C) Eu ³⁺ (D) Tb ³⁺ (E) Sm ²⁺ Choose the correct answer from the options given below :
Options
- A(A) and (D) only
- B(B) and (C) only
- C(A) and (B) only
- D(B) and (E) only
Correct answer
C. (A) and (B) only
Step-by-step solution
aligned & ₆₃ Eu ²⁺-[ Xe ] 4 f ^7 6 ~s ^0 & ₆₄ Gd ³⁺-[ Xe ] 4 f ^7 5 ~d ^0 6 ~s ^0 & ₆₃ Eu ³⁺-[ Xe ] 4 f ^6 6 ~s ^0 & ₆₅ ~Tb ³⁺-[ Xe ] 4 f ^8 6 ~s ^0 & ₆₂ Sm ²⁺-[ Xe ] 4 f ^6 6 ~s ^0 & Eu ²⁺ & Gd ³⁺ aligned