The Colour Of 62Sm3+ is Yellow. The Expected Colour Of 66Dy3+ is

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Question

The colour of ₆₂Sm³⁺ is yellow. The expected colour of ₆₆Dy³⁺ is

Yellow
Blue
Red
Green

medium

Solution

Correct option is

Yellow

The electronic configuration of ₆₂Sm³⁺ is 4f⁴ and that of ₆₆Dy³⁺ is 4f⁹. The colour of fⁿ and f^{14 – n}are often identical.

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