Q. 12 E5.0( 1 Vote )

Comprehension giv

Answer :

From the periodic table and their electronic configuration is can be easily determined that they are halogens.

[Ar]4s2 4p5=35


[Kr]5s25p5=53


[Xe]6s26p5=85


As the p orbitals has 5 electrons and there are 7 electrons in the last shells therefore these are group 17 elements which are also called halogens.

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