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# Select the group where EN increases down the group.A) ${\text{Ca, Sr, Ba}}$B) ${\text{Zn, Cd, Hg}}$C) ${\text{F, Cl, Br}}$D) ${\text{Li, Na, K}}$

Last updated date: 11th Sep 2024
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Hint:Electronegativity of an element is the tendency of the element to attract the electrons to itself. The elements which are present in different groups in the periodic table have been given in each option. Analyze the given options see their position in the periodic table for increasing order of electronegativity.

2) Now let's analyze elements in the given options one by one. In option A the elements ${\text{Ca, Sr, Ba}}$ show the increase in the size when going down the group hence the electronegativity will decrease when going down the group. Hence, this option is an incorrect choice.
3) The option B elements ${\text{Zn, Cd, Hg}}$ are the transition elements. They show the increase in the electronegativity when going from ${\text{Zn}}$ to ${\text{Hg}}$ due to poor shielding of d and f orbital. Hence, this option is the correct choice.
4) The option C the elements ${\text{F, Cl, Br}}$ show the increase in the size when going down the group hence the electronegativity will decrease when going down the group. Hence, this option is an incorrect choice.
5) In option D the elements ${\text{Li, Na, K}}$ show the increase in the size when going down the group hence the electronegativity will decrease when going down the group. Hence, this option is an incorrect choice.
6) Therefore, the group ${\text{Zn, Cd, Hg}}$ shows an increase in electronegativity while going down the group.