What noble gas core precedes the valence shell ground state electron configuration for potassium (K)?
A) [Ar]
B) [Rn]
C) [Kr]
D) [Ne]
E) [Xe]

Name: What noble gas core precedes the valence shell ground state electron configuration for potassium (K)? A) [Ar] B) [Rn] C) [Kr] D) [Ne] E) [Xe]
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Question

Quizplus · Accepted Answer

Potassium (K) has 19 electrons. The noble gas that precedes K in the periodic table is argon (Ar), which has 18 electrons. Therefore, the noble gas core electron configuration for K is [Ar].

What Noble Gas Core Precedes the Valence Shell Ground State