De Broglie Reasoned That for the Electron in the Hydrogen

Multiple Choice

De Broglie reasoned that for the electron in the hydrogen atom to behave as a stable circular wave, the circumference of the electron's orbit must be ________

A) equal to the wavelength of the electron.
B) an integer multiple of the electron's wavelength.
C) a half integer multiple of the electron's wavelength.
D) twice the wavelength of the electron.
E) twice the diameter of the orbit.