According to strict IUPAC periodic table structural definitions, the inner transition elements (the f-block) are fundamentally characterized by the progressive, sequential filling of which specific en

Question

According to strict IUPAC periodic table structural definitions, the inner transition elements (the f-block) are fundamentally characterized by the progressive, sequential filling of which specific energy subshell?

Prashant Kotian · Accepted Answer

Correct answer: C. The hallmark of inner transition metals is that their differentiating electron enters the -subshell located two principal quantum levels below the outermost valence shell, mathematically designated as the orbital.

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