Which atom or ion does not have the electron configuration [Ne]3s²3p⁶? A) Ar B) Br^- C) Ca²⁺ D) Cl^- E) K⁺

Name: Which atom or ion does not have the electron configuration [Ne]3s 2 3p 6 ? A) Ar B) Br - C) Ca 2+ D) Cl - E) K +
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The electron configuration [Ne]3s²3p⁶ corresponds to the noble gas Argon (Ar). Br⁻ has an electron configuration of [Ar]4s²3d¹⁰4p⁶, which is different from [Ne]3s²3p⁶.

Which Atom or Ion Does Not Have the Electron Configuration