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QNEET-2016-Ch-1039: NEET 2016 Chemistry - Class 12 NEET-2016-Ch-1039 Solution: The electronic configuration of Eu (Atomic No. 63) Gd (Atomic…

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

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

and

[Xe]4f^85d^16s^2

[Xe]4f^7 6s^2 [Xe]4f^7 5d^1 6s^2

and

[Xe]4f^9 6s^2

[Xe]4f^7 6s^2 [Xe]4f^8 6s^2

and

[Xe]4f^8 5d^1 6s^2

[Xe]4f^6 5d^1 6s^2 [Xe]4f^7 5d^1 6s^2

and

[Xe]4f^9 6s^2

Step-by-Step Verified Solution

Eu (63) = [Xe] 4f 7 6s 2 Gd (64) = [Xe] 4f 7 5d 1 6s 2 Tb (65) = [Xe] 4f 9 6s 2