Question

two representations of the distribution of electrons in the potassium atom are shown. model 1 1s²2s²2p⁶3s²3p⁶4s¹ model 2 which model is useful in showing the reactivity of potassium? 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.

Explanation:

The reactivity of an atom is often related to the number of valence electrons. Model 1 shows the electron - configuration with the outermost electron in the 4s orbital, and Model 2 shows the outermost electron in the outermost ring. Both indicate that potassium has 1 valence electron which is crucial for its reactivity.

Answer:

D. Both models because each shows an electron in the outermost shell.