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 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

Oil Drop Experiment http://ffden-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