Question

Valency of the elements in the Halogen Group Is______.

Answer 1

Valency:

• “Valency is the combining capacity of an atom.”
• “The electrons present in the outermost shell of an atom are known as the valence electrons.”

Halogens:

• Halogens belong to p-block elements.
• They are placed in Group-$17$.
• The general electronic configuration of halogens is $n{s}^{2}n{p}^5$.
• The electrons in the outermost shell of halogen is $7$, which means it needs only one electron more to attain a stable electronic configuration. Thus the valency of elements in the halogen group is $1$.
• The non-metallic elements of Group $17$ of the periodic table are described below:

1. Fluorine $\left(\mathrm{F}\right)$
2. Chlorine $\left(\mathrm{Cl}\right)$
3. Bromine $\left(\mathrm{Br}\right)$
4. Iodine $\left(\mathrm{I}\right)$
5. Astatine $\left(\mathrm{At}\right)$
6. Tennessine $\left(\mathrm{Ts}\right)$

Therefore, the valency of the elements in the Halogen Group is $1$.