Lanthanoid ions with 4f7 configuration are: (A) Eu2+ (B) Gd3+ (C) Eu3+ (D) Tb3+ (E) Sm2+ Choose the correct answer from the options given below : (A) (A) and (B) only (B) (B) and (E) only (C) (A) and

Question

Lanthanoid ions with 4f7 configuration are: (A) Eu2+ (B) Gd3+ (C) Eu3+ (D) Tb3+ (E) Sm2+ Choose the correct answer from the options given below :

(A) (A) and (B) only
(B) (B) and (E) only
(C) (A) and (D) only
(D) (B) and (C) only

Prashant Kotian · Accepted Answer

Correct answer: A. (A) and (B) only 63Eu2+ [Xe] 4f7, 6s0 64Gd3+ [Xe] 4f7, 5d0, 6s0

💡 Solution & Explanation