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Answer the following Why the ground-state electronic configurations of gadolinium and lawrentium are different than expected? - Chemistry

Short Note

Answer the following

Why the ground-state electronic configurations of gadolinium and lutetium are different than expected?

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Solution

Gadolinium and lutetium show different ground-state electronic configurations because the 5d and 4f-orbitals are near to the same energy due to which the next electron goes in 5d-orbital instead of 4forbital. This retains the extra stability achieved when the 4f orbital is half-filled and completely filled respectively. Thus, 5d orbital contains one electron in the case of gadolinium and lutetium.

Concept: Inner Transition (f-block) Elements: Lanthanoids and Actinoids
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Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 8 Transition and Inner transition Elements
Exercise | Q 3.08 | Page 191
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