What is the electronic configuration of potassium ion?
Answer:
Well, potassium has \(Z=19 \ldots \ldots\)
Explanation:
And \(Z\) specifies the nuclear charge. For a neutral element there must be 19 electrons, 19 fundamental particles of negative charge. The electrons are arranged into shells….
And so the ion \(K^{+}\) must have 18 electrons: \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}\), and this configuration is precisely the same as that possessed by argon. Why?