When a hydrogen atom is in its lowest energy level,
A) the de Broglie wavelength of its electron equals its orbit diameter.
B) the de Broglie wavelength of its electron equals its orbit circumference.
C) its electron has left the atom.
D) its electron is at rest.

Question

Quizplus · Accepted Answer

The de Broglie wavelength of an electron in the lowest energy level (ground state) of a hydrogen atom equals the circumference of its orbit. This is a consequence of the wave-particle duality and the quantization of angular momentum in Bohr's model of the atom.

When a Hydrogen Atom Is in Its Lowest Energy Level