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Burnt phosphorous and sulfur and proved that the mass was the same as before, bringing about the Law of Conservation of Mass.
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Proust’s greatest accomplishment was disproving Berthollet with the law of definite proportions, also known as Prousts Law.
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Young discovered that when a single beam of light was seperated,and then reunited, the beams created a certain light-dark pattern. This was becasue of complimenting and canceling wavelenghts.
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The total pressure of a mixture of gases awas equal to the sum of the partial pressures that each individual gas exerted while occupying the same space.This scientific law became known as Dalton's Law of Partial Pressures in 1803
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In A New System of Chemical Philosophy, Dalton showed that atoms of different elements could be distinguished by their atomic weights
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developed Quantum theory, tried to make conclusions from radiation of heat to the radiation of an atom and discovered quanta. Debunked all previous thoughts of radiation and energy.
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Discovered the photoelectric effect.In the photoelectric effect, electrons are emitted from matter as a consequence of their absorption of energy from electromagnetic radiation, such as visible or ultraviolet light. Electrons emitted in this manner may be referred to as photoelectrons.
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worked with Rutherford on the gold foil test. Fired atomic particles at the foil and whatched them bounce back.
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Used a cathode ray tube (CRT) to determine the electron-mass ratio.
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Using the CRT, Thomson discovered that there were negatively charged particles orbiting around every nucleus
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these to scientist isolate a substance they called "radium". The discovery of a new element is a milestone in scientific history.
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Einstein Created the General Theory of relativity. He also figure that light energy can be absorbed or emitted only in discrete packets called quanta. Einsted proposed the equivalence of energy and mass with his famous equaition: e=mc^2. Also mathematically iproved the existence of atoms.
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The Nobel Prize in Physics was awarded to J.J. Thomson "in recognition of the great merits of his theoretical and experimental investigations on the conduction of electricity by gases".
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developed the geiger counter, which ticked when it hit alpha particles.
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The Nobel Prize in Chemistry 1908 was awarded to Ernest Rutherford "for his investigations into the disintegration of the elements, and the chemistry of radioactive substances".
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used thin gold foil to find that the nucleus is densly packed. also assumed that the electrins were on the outside.
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Neils Bohr developed a simplistic, yet innacurate model for an atom.
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The Nobel Prize in Physicswas awarded to Max Planck "in recognition of the services he rendered to the advancement of Physics by his discovery of energy quanta".
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to his discovery of the increase of wavelength of X-rays due to scattering of the incident radiation by free electrons, which implies that the scattered quanta have less energy than the quanta of the original beam. This effect isknown as the Compton effect,
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French, Louis de Broglie introduced his theory of particle-wave duality in 1924
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Wolfgang Pauli is wll know for the Pauli Exclusion Principle which states that no two electrons in an atom can have the same four quantum numbers. This allows scientist to give electrons an “address” to further distinguish themselves from others in the same atom.
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Schrödinger developed a way to mathematically and visually display the wave patterns of electrons. Surpassed Bohr's model.
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says the less precisely the momentum is known, the more precissely the atom was placed.
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Compton wins a Nobel Prize "for his discovery of the effect named after him"
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equation for the motion of the wave of an electron.
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Received the Nobel Prize on his wave nature of electrons discover.
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Poves existence of the neutron. Is what accelerated the research in nuclear physics greatly.
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The Nobel Prize in Physics was awarded to Werner Heisenberg "for the creation of quantum mechanics, the application of which has, inter alia, led to the discovery of the allotropic forms of hydrogen".
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Anderson took a clear shot of a positron shifting through a lead plat in the cloud chamber.
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The Nobel Prize in Physics was awarded to Erwin Schrödinger "for the discovery of new productive forms of atomic theory"
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The Nobel Prize was awarded to Erwin Schrödinger and Paul Adrien Maurice Dirac "for the discovery of new productive forms of atomic theory"
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neutrons are decaying to a proton and emits an electron and a particle which he called a "neutrino"
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The Nobel Prize was awarded to James Chadwick "for the discovery of the neutron".
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The Nobel Prize was awarded to Irène Joliot-Curie "in recognition of her synthesis of new radioactive elements"
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The Nobel Prize was awarded to Carl David Anderson "for his discovery of the positron".
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Enrico Fermi received the Nobel Prize for "his discovery of new radioactive elements produced by neutron irradiation"
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reasearched the action of neutrons
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Otto Frisch works toward reaching nuclear fission.
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produced Uranium nuclear fission
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created controlled nuclear fission
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Figured out the correct way to produce Litlle Boy.
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The Nobel Prize was awarded to Wolfgang Pauli "for the discovery of the Exclusion Principle, also called the Pauli Principle".
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The theory called quantum electrodynamics, developed from work by Richard Feynman and Julian Schwinger.
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Broglie became the first prestigious scientist to call for a multi-national laboratory
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discovered cosmic radiation with a mass of about 200 electron masses, one-tenth of a proton, that is called a mesotron.
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murray gell-mann and george zweig theorized that the differences between protons, neutrons, and newly discovered particles could be explained by the existence of these even smaller particles.
