Two representations of the distribution of electrons in the potassium atom are shown. Model 1 Model 2 1s22s22p63s23p64s1 An orange circle labeled upper K is surrounded by four concentric circles. The innermost circle has dots at the north and south positions. The second and third circles have eight dots, equally spaced, with dots aligning with those on the inner ring. The outer ring has one dot at the north position. Which model is useful in showing the reactivity of potassium?

In the given scenario, both the models are satisfactory as they show the valence electrons, and these valence electrons indicate the reactivity of an element. The correct option is D.

What are valance electrons?

A valence electron is an electron in the external shell of an atom that can contribute to the establishment of chemical bonds.

It is evident that model 1 and model 2 have the same electronic configuration for potassium.

The reactivity of potassium is due to the presence of one electron in the outer edge valence shell.

Thus, the correct option is D.

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The missing options of the question are:

Neither model is able to show the reactivity of potassium.
Model 1 because it shows an electron in the 4s orbital.
Model 2 because it shows an electron in the outermost ring.
Both models because each shows an electron in the outermost shell.