Question

Pls, Help!!!!

When ionized, which of the following would become isoelectronic with argon?

Answer 1

`Cl^-`

Step-by-step explanation:

Hello.

In this case, when chlorine gets ionized by gaining one electron it goes:

`Cl^-`

Whose electron configuration is the same as argon:

`Cl^-=Ar:1s^2,2s^2,2p^2,3s^2,3p^6`

Since the both of them have 18 electrons, they become isoelectric with the same neutral charge.

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