Which of the Following Statements Is FALSE

Multiple Choice

Which of the following statements is FALSE?

A) Spin quantum number is the fourth quantum number and it represents the spin of an electron.
B) No two electrons in an atom can have the same four quantum numbers.
C) Repulsion of one electron by other electrons is known as shielding.
D) An atom or ion that contains unpaired electrons is attracted to an external magnetic field and is called diamagnetic.
E) The electrons that are represented outside the core electrons are called valence electrons.