How many of the following statements are false?
I. The principal quantum number n is related to the size of an orbital.
II. s, p, d, f represent orbitals with different azimuthal quantum numbers.
III. The magnetic quantum number can have values of +½ or -½.
IV. The spin quantum number is related to the orientation of an orbital.
V. The electron density at a point is proportional to Ψ 2 at that point.