JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The lanthanoide that would show colour is
- A \(Gd^{3+}\)
- B \(La^{3+}\)
- C \(Lu^{3+}\)
- D \(Sm^{3+}\)
Answer & Solution
Correct Answer
(D) \(Sm^{3+}\)
Step-by-step Solution
Detailed explanation
\(Sm^{3+}\,(4f^5) =\) yellow colour, other ions have stable electron configurations with half filled or full-filled electron configuration.
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