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# What is the valency of chlorine?

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## ValencyThe valency of an atom refers to its ability to combine with other atoms. The valency of an element determines the number of bonds that an atom can make as part of a complex. The valence of an element is the number of hydrogen atoms that can mix with or replace one of the element's atoms (directly or indirectly).Valency of ChlorineChlorine has an atomic number of $17$.Chlorine's electrical configuration is $\left[\mathrm{Ne}\right]3{\mathrm{s}}^{2}3{\mathrm{p}}^{5}$, which can also be represented as $2,8,7$.This demonstrates that chlorine's outermost shell has seven valence electrons.If there are more than four valence electrons, the valency can be determined as follows: $\mathrm{Valency}=\mathrm{Valence}\mathrm{electron}-8$As a result, chlorine has a valency of $8-7$, which is $1$.Hence, chlorine has a valency of $1$.

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