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Q.

In which group of modern periodic table, the elements of 4th, 5th and 6th period have different ground state electronic configuration for last two shells, from each other?

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a

9

b

18

c

8

d

10

answer is C.

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Detailed Solution

Ni 28  : [Ar] 18  4s2 3d8 Pd 46  : [Kr] 36  4d10  Pt 78  : [Xe] 54  4f14 6s1 5d9

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