Question:
The most common oxidation state for all lanthanoids is:
The most common oxidation state for all lanthanoids is:
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Lanthanoids mostly form trivalent ions (\( +3 \)), which is a key feature of their chemistry.
Updated On: Jul 8, 2025
- \( +5 \)
- \( +2 \)
- \( +3 \)
- \( +4 \)
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The Correct Option is C
Solution and Explanation
Step 1: Lanthanoids belong to the f-block elements, specifically the 4f series.
They are characterized by the filling of the 4f orbitals.
Step 2: The most stable and common oxidation state for almost all lanthanoids is \( +3 \).
This is due to the stable removal of two 6s electrons and one 5d or 4f electron.
Step 3: Some lanthanoids can also show \( +2 \) and \( +4 \) oxidation states,
but these are less common and occur only in certain cases (e.g., Eu\(^{2+}\), Ce\(^{4+}\)).
The \( +5 \) oxidation state is very rare and not typical for lanthanoids.
They are characterized by the filling of the 4f orbitals.
Step 2: The most stable and common oxidation state for almost all lanthanoids is \( +3 \).
This is due to the stable removal of two 6s electrons and one 5d or 4f electron.
Step 3: Some lanthanoids can also show \( +2 \) and \( +4 \) oxidation states,
but these are less common and occur only in certain cases (e.g., Eu\(^{2+}\), Ce\(^{4+}\)).
The \( +5 \) oxidation state is very rare and not typical for lanthanoids.
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