The existence of discrete (quantized)energy levels in an atom may be inferred from:
A)diffraction of electrons by crystals
B)X-ray diffraction by crystals
C)atomic line spectra
D)experiments on the photoelectric effect
E)visible spectrum

Question

Quizplus · Accepted Answer

Atomic line spectra, such as the one observed in the Balmer series of hydrogen, show distinct lines of emitted or absorbed light at specific wavelengths. These wavelengths correspond to energy differences between discrete energy levels in the atom. This is evidence for quantized energy levels in atoms.

The Existence of Discrete (Quantized)energy Levels in an Atom May