Niels Bohr promoted the connection between the periodic table and quantum theory. Which of the following statements is INCORRECT?
◦ The link between the table arrangement and quantum theory is electron configuration.
◦ Elements in the same group have similar electron configurations.
◦ Elements in the same group have the same number of electrons in the outer orbit.
◦ Elements in the same group have the same principle quantum number.
◦ Elements in the same group have the same number of valence electrons.