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Q.

Which of the following is the incorrect match for the position of element in periodic table?

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a

[Ar]3d54s1 →4th period, 6th group

b

[Kr]4d10 →5th period, 12th group

c

[Rn]6d27s2 →7th period, 3th group

d

[Xe]4f145d26s2→6th period, 4th group

answer is D.

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Detailed Solution

(i) [Ar]3d54s1→Cr(24)→4th period, 6th group (ii) [Kr]4d10→Pd(46)→5th period, 12th group (iii) [Rn]6d27s2→Th(90)→7th period, 3rd group (iv) [Xe]4f145d26s2→Hf(72)→6th period, 4th group

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Which of the following is the incorrect match for the position of element in periodic table?