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Keystone Chemisty Midterm (Jones)

Aristotle 4 element theory, Earth, Air, Fire, Water
Democritus said the universe is comprised of small particles that cannot be divided any more
John Dalton All matter is made of atoms, Atoms of the same element are identical, Atoms of different atoms are not identical, Atoms cannot be created or destroyed
J.J. Thomson Used the cathode ray tube to find electrons
Robert Millikan Plum-Pudding Model
Becquerel discovered radioactivity in Uranium
Curie discovered Polonium
Earnest Rutherford Shot alpha particles @ a pice of gold foil, discovered the nucleus, and protons of an atom
James Chadwick Used cloud chamber to determine the mass of an atom
Bohr LInked the atom's electrons w/ photon emissions
DeBroglie electrons have a wave particle duality, like light
Heisenberg "Uncertainty Priciple" (cant find position and velocity of an electron @ the same time)
Schroedinger created electron Wave Equation
Created by: ttrakas