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18 Cards in this Set
- Front
- Back
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JJ Thomson
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found electrons
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Rutherford
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atoms r positively charged
and r mostly empty space |
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milikan
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determed mass of electron
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goldstein
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discovered proton
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chadwick
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discovered neutron
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proust
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Law of Definite Proportions
(chem compound contains same elements in exactly same proportions by mass) |
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lavoisier
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Law of Conservattino of Mass
(matter can't be created nor destroyed) |
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Aristotle
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believed mass was continuous
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Dalton
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Dalton's atomic theory
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Democritus
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suggested world consisted of EMPTY SPACE and ATOMS
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Geiger and Marsden
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performed gold foil experiment under Rutherford's direction
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Schrodinger
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electrons travel in orbits
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Schrodinger
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developed equation that treated electrons in atoms as waves
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Heisenberg
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it's impossible to determine simultaneously the position and velocity of an electron
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deBroglie
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electrons have wave-like properties
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Bohr
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his model explained observed spectral lines of hydrogen atom ONLY
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Planck
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objects emit quanta
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Einstein
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light behaves as ENERGY and MATTER
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