Discovery of the Electron, Models, and Theories. Andrew, Anthony, Cody
JJ Thompson Born 1856, England; Died 1940 (age 83) Won Nobel Prize (1906) Made great inquirers about the atom’s smaller particles Concluded atoms were divisible based on his work
JJ Thomson Experiments dealt with cathode rays Biggest parts in discovering the electron Link to more on his experiment Thomson's Experiment Thomson's Experiment
Thomson’s Model
Robert Millikan Born 1868, Illinois; Died 1953 (age 85) Won Nobel Prize (1923) Discovered charge of electron Oil-drop experiment
Robert Millikan Weight-to-charge ratio
Niels Bohr Born in 1885, Denmark; Died 1962 (age 77) Won Nobel Prize(1922) Did work on quantum theory Made model of atom
Niels Bohr Used different theories & structures to create atomic model Model had electrons orbiting around nucleus
Niels Bohr
Louis de Broglie Born 1892, in France; Died 1987 (age 94) Won Nobel Prize (1929) Wave nature of electrons All matter has wave properties
Werner Heisenberg Born 1901, Germany; Died 1976 (age 74) Won Nobel Prize (1932) Creator of quantum mechanics Published paper on model of nucleus
Werner Heisenberg
Erwin Schrodinger Born 1887 in Austria; Died 1961 (age 73) Won Nobel Prize (1933) Worked on quantum theory Looked at electron orbit
Erwin Schrodinger Important work on wave mechanics Made quantum Model
Bohr’s Model Hydrogen only Electrons orbit around nucleus Disproved by quantum mechanical
Bohr’s Model
Quantum Mechanical Model Made by Schrodinger Depicts electron movement Works with all elements
Quantum Mechanical Model
Cathode Experiment Thomson's Cathode Ray Experiment Thomson's Cathode Ray Experiment
Oil Drop Experiment 2.phys.uaf.edu/212_fall2003.web.dir/Ryan _McAllister/Slide3.htm 2.phys.uaf.edu/212_fall2003.web.dir/Ryan _McAllister/Slide3.htm
Timeline
Correct Theories/Models Bohr’s model Broglie’s thesis Schrodinger’s model Planck’s quantum theory Heisenberg’s model
Incorrect Theories/Models Thomson’s model Bohr’s Model