Correct configuration of Gadolinium ( Z = 64) is

Chemistry · Class 12 · CBSE — The d- and f-Block Elements

1. [Xe]4f ⁸ 5d ¹ 6s²
2. [Xe]4f ⁷ 5d ¹ 6s²
3. [Xe]4f ³ 5d ⁵ 6s²
4. [Xe]4f ⁶ 5d ² 6s²

Answer

(B) [Xe]4 f 7 5 d 1 6 s 2

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