Chemistry d And f - Block Elements

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 :

1
(A) and (B) only
2
(A) and (D) only
3
(B) and (E) only
4
(B) and (C) only 

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