We have to determine the most stable ion of potassium (K).
We can start solving this problem by writing the electron configuration of potassium and the noble gas closest to it. We will write the electron configuration of K and Ar.
• In a neutral atom:
Atomic number= # of protons = # of electrons
K: atomic number = 19 → 19 protons & 19 electrons
Ar: atomic number = 18 → 18 protons & 18 electrons
Each of the following elements is capable of forming an ion in chemical reactions.
By referring to the periodic table, predict the charge of the most stable ion of K.
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