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

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By Expert Faculty of Sri Chaitanya
a
[Xe]4f65d16s2,[Xe]4f75d16s2 and [Xe]4f85d16s2
b
[Xe]4f76s2,[Xe]4f75d16s2 and [Xe]4f96s2
c
[Xe]4f76s2,[Xe]4f86s2 and [Xe]4f85d16s2
d
[Xe]4f65d16s2,[Xe]4f75d16s2 and [Xe]4f96s2
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detailed solution

Correct option is B

[Xe]4f76s2,[Xe]4f75d16s2 and [Xe]4f96s2


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