WBJEE · Chemistry · Structure of Atom
Identify the ion having \(4 f^6\) electronic configuration.
- A \(\mathrm{Gd}^{3+}\)
- B \(\mathrm{Sm}^{3+}\)
- C \(\mathrm{Sm}^{2+}\)
- D \(\mathrm{Tb}^{3+}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Sm}^{2+}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { Hint : }{ }_{62} \mathrm{Sm}=[\mathrm{Xe}] 4 \mathrm{f}^6 6 \mathrm{~s}^2 \\ & \therefore \mathrm{Sm}^{+2}=[\mathrm{xe}] 4 \mathrm{f}^6 6 \mathrm{~s}^0\end{aligned}\)
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