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Copy of Atomic Structure Timeline
Transcript of Copy of Atomic Structure Timeline
Max Planck developed the concept of quantum mechanics. His This concept served as the foundation for all modern physics and most atomic models. Robert Millikan Millikan determined the unit charge of the electron. His discovery allowed for the calculation of the electron and all positively charged atoms. Niels Bohr Bohr proposed an atomic structure theory that stated the outer orbit of an atom could hold more electrons than the inner orbit. Louis deBroglie deBroglie proposed that electrons could behave as waves under certain conditions. He stated that electrons have a wave/particle duality. Erwin Schrödinger Erwin Shrodinger developed the Shrodinger equation. This equation can be used to predict the properties reactivities of all atoms and molecules. His work led to the atomic cloud model. Werner Heisenberg Werner Heisneberg discovered the Heisenberg Uncertainty Principle which states that the momentum and position of a particle cannot be simultaneously measured with high precision. James Chadwick James Chadwick confirmed the existence of the neutron. Sources cited Greek thinker Leucippus and Democritus came up with the idea of an indivisible(uncuttable), solid sphere model Plum-pudding Model positive sphere (pudding) with negative electrons (plums) dispersed throughout Nuclear Model
dense, positive nucleus surrounded by negative electrons Planetary Model
electrons move in circular orbits within specific energy levels http://fireisthebest.wikispaces.com/The+Solid+Sphere+Model http://www.barcodesinc.com/articles/timeline-on-atomic-structure.htm http://www.sparknotes.com/testprep/books/sat2/chemistry/chapter4section4.rhtml wikipedia dates http://www.flashcardmachine.com/atomic-structure-people.html http://atomictimeline.net/index.php http://www.timetoast.com/timelines/25291 http://library.thinkquest.org/19662/low/eng/ancient.html