Question:
The lanthanoid with the outer electronic configuration \(4f^7 5d^1 6s^2\) is
The lanthanoid with the outer electronic configuration \(4f^7 5d^1 6s^2\) is
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Half-filled (\(f^7\)) and fully-filled (\(f^{14}\)) configurations are especially stable.
Updated On: Apr 24, 2026
- Neodymium
- Samarium
- Europium
- Gadolinium
- Holmium
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The Correct Option is D
Solution and Explanation
Concept:
Lanthanoids show characteristic electronic configurations with partially filled \(4f\) orbitals.
Step 1: Identify configuration.
\[ 4f^7 5d^1 6s^2 \]
Step 2: Recognize element.
Gadolinium (Gd) has this configuration due to extra stability of half-filled \(4f^7\).
Step 1: Identify configuration.
\[ 4f^7 5d^1 6s^2 \]
Step 2: Recognize element.
Gadolinium (Gd) has this configuration due to extra stability of half-filled \(4f^7\).
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