The number of valence electrons in Cl^{-} ion | vedclass

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Question

(D) The atomic number of chlorine $(Cl)$ is $17$.Its electronic configuration is $2, 8, 7$.This means it has $7$ valence electrons in its neutral stat

Vedclass · Accepted Answer

$8$

Vedclass · Answer

(D) The atomic number of chlorine $(Cl)$ is $17$.Its electronic configuration is $2, 8, 7$.This means it has $7$ valence electrons in its neutral state.When it forms a chloride ion $(Cl^{-})$,it gains one electron to complete its octet.The electronic configuration of $Cl^{-}$ becomes $2, 8, 8$.Therefore,the number of valence electrons in the $Cl^{-}$ ion is $8$.

The number of valence electrons in $Cl^{-}$ ion are

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