Periodic prrop

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which block does this element belong to?? [Xe] 6s² 4f⁷ 5d¹
a)s-block b)p-block c)d-block d)f-block
Give proper reason plzz!:)

#Chemistry #Inorganic Chemistry

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4 Answers

Vivek @ Born this Way ·2010-10-11 02:26:09

I think f block.

Because there are 10 electrons. So 10th element after Xenon. and the Period is 6 because the last shell no. is 6. So it is a lanthanoid and in f-block.

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Shubh ·2010-10-11 04:05:54

thats rite but i want show the exception in the EC and wht would b the reason?

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Abhisek ·2010-10-11 04:32:05

The reason for the different EC is the fact that half-filled orbitals are more stable than fully filled ones..

So the "8th electron" in the 4f orbital goes to 5d...

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Shubh ·2010-10-11 04:37:20

thnx.......for clearing it....!:)

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Periodic prrop

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