The electronic configuration of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No.65) are

Question

[Xe]4f⁶5d¹6s²,
[Xe]4f⁷5d¹6s² and [Xe]4f⁸5d¹6s²

[Xe]4f⁷ 6s², [Xe]4f⁷ 5d¹ 6s² and [Xe]4f⁹ 6s²

[Xe]4f⁷ 6s², [Xe]4f⁸ 6s² and [Xe]4f⁸ 5d¹ 6s²

[Xe]4f⁶ 5d¹ 6s², [Xe]4f⁷ 5d¹ 6s² and [Xe]4f⁹ 6s²

Please login to view the detailed solution steps...