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Question: Answered & Verified by Expert
In lanthanide series, the element well known to exhibit +4 oxidation state is
Chemistryd and f Block ElementsAP EAMCETAP EAMCET 2018 (22 Apr Shift 1)
Options:
  • A Lu
  • B $\mathrm{Ce}$
  • C $\mathrm{Pm}$
  • D $\mathrm{Nd}$
Solution:
2165 Upvotes Verified Answer
The correct answer is: $\mathrm{Ce}$
$$
\begin{aligned}
\mathrm{Ce}(58) & =[\mathrm{Xe}] 4 f^1 5 d^1 6 s^2 \\
\mathrm{Ce}^{+4} & =[\mathrm{Xe}] 4 f^0 5 d^0 6 s^0
\end{aligned}
$$
Cerium exihibit +4 oxidation state.

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