Question:
The ground state electronic configuration of Gadolinium (Z=64) is:
The ground state electronic configuration of Gadolinium (Z=64) is:
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Gadolinium is exception-stable because it prefers a half-filled 4f subshell.
Updated On: Jun 10, 2026
- $[Xe] 4f^7 5d^1 6s^2$
- $[Xe] 4f^8 5d^0 6s^2$
- $[Xe] 4f^9 5d^0 6s^1$
- $[Xe] 4f^7 5d^2 6s^1$
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Electronic configuration of Lanthanoids.
Step 2: Analysis
Gadolinium ($Z=64$). The configuration is $[Xe] 4f^7 5d^1 6s^2$. This is stable because of the half-filled f-orbital ($f^7$).
Step 3: Conclusion
Option (A) is the correct ground state configuration.
Final Answer: (A)
Electronic configuration of Lanthanoids.
Step 2: Analysis
Gadolinium ($Z=64$). The configuration is $[Xe] 4f^7 5d^1 6s^2$. This is stable because of the half-filled f-orbital ($f^7$).
Step 3: Conclusion
Option (A) is the correct ground state configuration.
Final Answer: (A)
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