History of the Atom Review

History of the Atom Review - Andrew Rosen lanck s R O Y...

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hot emitted Neutron gamma electron Proton alpha - + Gold Foil 2% deflected (Small dense positive charged nucleus) ate from high voltage and come back to ground state and release energy as light P N Electrons have more energy R O Y G B I V 700nm 400nm UV X-ray Gamma o Microwave Infrared Planck’s Constant 6 .63 x 10 -34 J/Hz rprint” for an element Andrew Rosen History of the Atom Democritus: World is made of empty space and tiny particles “atomos” Aristotle: Matter is continuous (not made of small particles) False Newton and Boyle: Believed in the atomic nature of elements Dalton: Explanation for the existence of atoms Lavoisier: The law of conservation of matter (Energy can’t be created or destroyed, it can only change forms) Proust: Law of definite proportions (Substances contain the same ratio by mass) Dalton’s Atomic Theory: All matter is made of small particles, atoms of an element are exactly alike, atoms of a different element combine to form compounds (Indefinite ratios)
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History of the Atom Review - Andrew Rosen lanck s R O Y...

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