Which of the Following Statements Is False?
A) in the Usual

Which of the following statements is false?

A) In the usual order of filling, the 6s orbital is filled before the 4f orbital.
B) An orbital can accommodate at most two electrons.
C) The spin quantum number of an electron must be either +1/2 or -1/2.
D) A 2p orbital is more penetrating than a 2s; that is, it has a higher electron density near the nucleus and inside the charge cloud of a 1s orbital.
E) The electron density at a point is proportional to $\Psi$ ² at that point.