Argon has a completely filled p sublevel, giving it chemical stability. potassium has one electron in the 4s sublevel and can easily lose this electron, so it has a argon has a completely filled p sublevel, giving it chemical stability. potassium has one electron in the 4 s sublevel and can easily lose this electron, so it has a blank first ionization energy. therefore, it blank the 4 s electron to achieve an blank electron configuration, giving it the added stability of the filled p sublevel. first ionization energy. therefore, it argon has a completely filled p sublevel, giving it chemical stability. potassium has one electron in the 4 s sublevel and can easily lose this electron, so it has a blank first ionization energy. therefore, it blank the 4 s electron to achieve an blank electron configuration, giving it the added stability of the filled p sublevel. the 4s electron to achieve an argon has a completely filled p sublevel, giving it chemical stability. potassium has one electron in the 4 s sublevel and can easily lose this electron, so it has a blank first ionization energy. therefore, it blank the 4 s electron to achieve an blank electron configuration, giving it the added stability of the filled p sublevel. electron configuration, giving it the added stability of the filled p sublevel.