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  • The electronic configurations of Eu (Atomic No.63), Gd (Atomic No.64 and Tb (Atomic No.65) are :Option: 1 <

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

Option: 1

[Xe]4f^76s^2, [Xe]4f^86s^2 and [Xe]4f^85d^16s^2


Option: 2

[Xe]4f^65d^16s^2, [Xe]4f^75d^16s^2 and [Xe]4f^96s^2


Option: 3

[Xe]4f^65d^16s^2, [Xe]4f^75d^16s^2 and [Xe]4f^85d^16s^2


Option: 4

[Xe]4f^76s^2, [Xe]4f^75d^16s^2 and [Xe]4f^96s^2


Answers (1)

best_answer

As we discussed in the Concept

Atom              Atomic Number       Electronic   Configuration

Eu                     63                           [Xe]4f7 , 6s2

Gd                    64                           [Xe] 4f7, 5d1, 6s2

Tb                    65                           [xe]4f9 , 6s2

The Correct answer is option 4.

Posted by

SANGALDEEP SINGH

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