Potassium has an atomic number of 19. What is its electron configuration?

Which of the following best describes an electron?

How does the movement of electrons change when atoms are in close proximity?

What is the electron configuration of the chloride ion (Cl⁻) after a chlorine atom gains an electron?

What is the electron configuration of chlorine (Cl)?

Which of the following is the correct electron configuration for sodium (Na)?

Which statement about the electron-cloud model is true?

How many electrons can occupy the second energy level (n = 2) of an atom?