Teacher resources and professional development across the curriculum

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Unit 3: Atoms and Light—Exploring Atomic and Electronic Structure

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Hosted by Michael McCarthy

Michael McCarthy

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. The measurement of atomic spectra has applications in astrophysics as well as forensic chemistry.

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