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Q.

Element ‘X’ belongs to the period 4 and group 17 of the modern periodic table. The valence shell electronic configuration of the element, which is just above ‘X’ in the group is:

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a

3d104s24p5

b

2s22p5

c

3s23p5

d

4d105s25p5

answer is A.

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Detailed Solution

X is bromine hence the element present just above bromine is chlorine

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