8/5/2023 0 Comments Atomic structure powerpoints30, 6 1924 de Broglie's hypothesis 0 Nickel stal 1927 Davisson. Electron gun hot filament to Mrelease electrons +54 V Accelerating o electrode Theory -1.67Åfor54V Experiment Pathlength difference d sine 1.65Å for constructive interference Not bad for a three ear old idea! Nickel lattice spacing d = 2,15Å Second Series December, 1927 THE Vol. They discovered the wave nature of electron by getting a diffraction pattern from a Ni crystal by bombarding a beam of electron. Science Texas Essential Knowledge and Skills (TEKS)Ĩ.3B – TSIET use models to represent aspects of the natural world such as an atom, a molecule, space, or a geologic feature Ĩ.5A – TSIET describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons in the nucleus and electrons in the electron cloud Ĩ.Experimental proof of de Broglie hypothesis Davisson-Germer experiment (1923-1927) confirms the de Broglie hypothesis (wave-particle duality). Scientific and Engineering Practices: Developing and using models, constructing explanations (for science), obtaining, evaluating, and communicating information (MS-PS1-1)Ĭrosscutting Concepts: Patterns, Scale, Proportion, and Quantity, Systems and System Models, Energy and Matter Atoms form molecules that range in size from two to thousands of atoms. O Substances are made from different types of atoms, which combine with one another in various ways.
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