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12 Cards in this Set

  • Front
  • Back
all matter is made up of indivisble elements - "atomas"
Antoine Lavoisier
Law of Conservation of Mass
(mass will remain constant)
meltin rusting --> oxygen
Joseph Louis Proust
Law of Constant Composition
(compound always contains same proportion of elements by mass)
compared coppers
John Dalton
Atomic Theory ; compound atom

elements made of tiny particles, all atoms of an element are identical, atoms of diff. elements are different, atoms combine to make compounds, atoms cant be created / destroyed
J.J. Thompson
electron, Charge:mass ratio

Cathode Ray Tube, Plum Pudding
Henri Becquerel
Ernest Rutherford
particles, an atom has a positievly charge nucleus surrounded by electrons

Gold Foil Experiment (deflection of particles)
Robert Milikan
Electrical charge

Oil Drop Experiment
Neils Bohr
atoms as a nucleus surrounded by electrons that travel around the nucleus
H.G. Moseley
James Chadwick
Erwin Schrodinger
wavelengths, qunatum mechanical model