Only Certain Electron Orbits Are Possible in the Atom Because

Multiple Choice

Only certain electron orbits are possible in the atom because

A) this is the way Ernest Rutherford interpreted his data.
B) energy levels must be divisible by Planck's constant
C) the velocity of a photon can be quantized.
D) the electron's distance from the nucleus has to satisfy a wave and particle duality.
E) objects in the quantum world behave only according to Newtonian principles.