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d and f BLOCK ELEMENTS
Question #40162
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Question
Why is the +2 oxidation state particularly stable for Europium (Eu) and Ytterbium (Yb)?
A. Because they have fewer protons.
B. Because they are lighter elements.
C. Because Eu2+ has a half-filled f-subshell (4f7) and Yb2+ has a fully-filled f-subshell (4f14).
D. Because they are radioactive.
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