Which one of the following is true?
A) The electron spin quantum number can take on any one of four different values.
B) The principal quantum number of the electron in a hydrogen atom does not affect its energy.
C) The principal quantum number of an electron in the ground state is zero.
D) The orbital angular momentum quantum number of an electron state is always less than the principal quantum number.

Question

Quizplus · Accepted Answer

The orbital angular momentum quantum number (l) for an electron in any given shell is always one less than the principal quantum number (n) of that shell, making it always less than the principal quantum number. This is a fundamental rule of quantum mechanics that defines the possible values of l for a given n.

Which One of the Following Is True