1. How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values? 2. Some older cars vibrate loudly when driven at particular...

1. How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values?

2. Some older cars vibrate loudly when driven at particular speeds. For example, at 65 mph the car is very quiet, but at 60 mph the car rattles uncomfortably. How is this analogous to the quantized energy levels of an electron in an atom?