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From the following list of observations,choose the one that most clearly supports the following conclusion:
a) emission spectrum of hydrogen
b) the photoelectric effect
c) scattering of alpha particles by metal foil
d) diffraction
e) cathode "rays"
-Electrons in atoms have quantized energies.
Demographic
Statistical data relating to the population and particular groups within it, used for marketing, policy making, and social studies.
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