Question:
Which one of the following actinoid has no electron in 6d orbital?
Which one of the following actinoid has no electron in 6d orbital?
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Actinoid configurations are irregular. Plutonium is commonly represented as \([Rn]5f^6 7s^2\), with no \(6d\) electron.
Updated On: Apr 29, 2026
- Pa
- Np
- Lr
- Cm
- Pu
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The Correct Option is
Solution and Explanation
Concept:
Actinoids show irregular electronic configurations due to small energy difference between \(5f\), \(6d\), and \(7s\) orbitals.
Step 1: Recall configuration of plutonium.
Plutonium has configuration approximately: \[ [Rn]\,5f^6\,7s^2 \]
Step 2: Check 6d orbital.
There is no electron in the \(6d\) orbital in plutonium.
Step 3: Select answer.
Hence, the actinoid having no electron in \(6d\) orbital is: \[ Pu \]
Step 1: Recall configuration of plutonium.
Plutonium has configuration approximately: \[ [Rn]\,5f^6\,7s^2 \]
Step 2: Check 6d orbital.
There is no electron in the \(6d\) orbital in plutonium.
Step 3: Select answer.
Hence, the actinoid having no electron in \(6d\) orbital is: \[ Pu \]
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