The electron configuration of atomic argon is the same as the chloride ion (Cl-).

Name: The electron configuration of atomic argon is the same as the chloride ion (Cl-).
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The electron configuration of atomic argon is 1s2 2s2 2p6, while the electron configuration of the chloride ion is 1s2 2s2 2p6 3s2 3p6. However, both have a full outer energy level with 8 electrons, which is why they exhibit similar chemical behavior.

The Electron Configuration of Atomic Argon Is the Same as the Chloride