Question

question 3 (1 point) which of the following is the correct electron configuration for chloride ion (cl⁻)? ar ne3s²2p⁵ ne3s¹2p⁶ ne3s²2p⁴

Explanation:

Chlorine (Cl) has 17 electrons. Chloride ion ($Cl^-$) has 18 electrons. Argon (Ar) also has 18 electrons and its electron - configuration can be used to represent $Cl^-$ as $Cl^-$ has a noble - gas electron configuration after gaining one electron. The other options with [Ne] as the core are incorrect because they do not represent 18 electrons correctly.

Answer:

[Ar]