Why do the elements of period 4 start a new cycle of properties after the element argon? Select all that apply.

The electrons in the outermost energy level are primarily responsible for the properties of an element.

Additional electrons after argon begin to fill a sublevel of the n = 4 energy level.

The n = 3 energy level of argon is complete.

All the energy levels of period 4 elements are less than period 3 because the amount of energy between energy levels decrease with distance from the nucleus.