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        Atoms and Light | Chemistry: Unit 3

        In the early 20th century, identification of the internal parts of the atom (electrons, protons, and neutrons) led to a modern subatomic theory. Meanwhile, the study of atomic spectra—the light given off by atoms at definite wavelengths—led to the Bohr model of the atom, where electrons exist at distinct energy levels and move between these levels by absorbing and emitting discrete quanta of energy. This half-hour program shows how measurement of atomic spectra has applications in astrophysics as well as forensic chemistry.

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