What is the core notation for the electron configuration of a potassium ion?

Name: What is the core notation for the electron configuration of a potassium ion?
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Quizplus · Accepted Answer

A potassium ion has lost one electron from its neutral atom configuration, which would be [Ar] 4s1. When an electron is lost, it comes from the outermost shell, so the core notation remains the same as in the neutral atom configuration. Therefore, the core notation for a potassium ion is simply [Ar].

What Is the Core Notation for the Electron Configuration of a Potassium