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Question

Chemistry Question on The Lanthanoids

The lanthanide ion that would show colour is-

A

Sm3+{Sm^{3+} }

B

La3+{La^{3+} }

C

Lu3+{Lu^{3+} }

D

Gd3+{Gd^{3+} }

Answer

Sm3+{Sm^{3+} }

Explanation

Solution

Sm3+(4f5){Sm^{3+} (4f^5) } = yellow colour