Orbital Electrons Do Not Spiral into the Atomic Nucleus Because

Multiple Choice

Orbital electrons do not spiral into the atomic nucleus because of

A) electrical forces,
B) the wave nature of the electrons,
C) angular momentum,
D) the discreteness of energy levels,
E) quantum mechanical laws,
And the electrons have discrete radii from the nucleus because
F) the circumference of each orbit is an integral multiple of the electron wavelength.
G) electrical forces act over discrete distances.
H) energy levels themselves are discrete.