d and f BLOCK ELEMENTS MCQ Quiz: GKFix - Bridge of Knowledge

Question 111

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What is the electronic configuration of Promethium (Pm)?

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What is the electronic configuration of Cerium (Ce)?

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What is the electronic configuration of Lanthanum (La)?

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Why do some Lanthanoids like Ce and Yb show stable +4 and +2 oxidation states respectively?

Because they have fewer electrons.
Because they are radioactive.
Because these states lead to stable electronic configurations (noble gas for Ce4+, half-filled or fully-filled f-subshell for others).
Because they are heavier elements.

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What is the common oxidation state of Ytterbium (Yb) in its compounds, besides +3?