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Q.

Which of the following do not belong to d-block elements?

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a

[Rn] 5f16d17s2

b

[Xe] 5d16s2

c

Both B & C

d

[Xe]4f15d16s2

answer is D.

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Detailed Solution

In the given configuration, [Xe]4f15d16s2 and [Rn]5f16d17s2, belong to f-block elements because of the presence of 4f and 5f subshells.

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