How many elements are there in the $4f$ series?
- A$10$
- B$14$
- C$15$
- D$7$
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Which of the following is responsible for the lanthanoid contraction?
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View SolutionWhich of the following $f$-block elements exhibits the highest oxidation state?
$A$ lanthanoid has $n$ unpaired electrons and another lanthanoid has $(14-n)$ unpaired electrons. It means:
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