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Antoine Lavoisier
Burnt phosphorous and sulfur and proved that the mass was the same as before, bringing about the Law of Conservation of Mass. -
J.L. Proust
Proust’s greatest accomplishment was disproving Berthollet with the law of definite proportions, also known as Prousts Law. -
Young's Wave theory of light
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. -
John Dalton
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 -
Dalton writes A New System of Chemical Philosophy
In A New System of Chemical Philosophy, Dalton showed that atoms of different elements could be distinguished by their atomic weights -
Max Planck
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. -
Heinrich Hertz
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. -
Ernest Marsden
worked with Rutherford on the gold foil test. Fired atomic particles at the foil and whatched them bounce back. -
J.J. Thomson
Used a cathode ray tube (CRT) to determine the electron-mass ratio. -
Thomson's electron
Using the CRT, Thomson discovered that there were negatively charged particles orbiting around every nucleus -
Marie and Piere Curie
these to scientist isolate a substance they called "radium". The discovery of a new element is a milestone in scientific history. -
Marie and Piere win a Nobel Prize
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Albert Einstein
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. -
Thomson recieves Nobel prize
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". -
Heins Geiger
developed the geiger counter, which ticked when it hit alpha particles. -
Ernest Rutherford Nobel
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". -
Ernest Rutherford's atomic probe
used thin gold foil to find that the nucleus is densly packed. also assumed that the electrins were on the outside. -
Bohr's model
Neils Bohr developed a simplistic, yet innacurate model for an atom. -
Planck's Prize
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". -
Aurther Compton Effect
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, -
Louis de Broglie
French, Louis de Broglie introduced his theory of particle-wave duality in 1924 -
Wolfgang Pauli
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. -
Schrödinger's wave-pattern equation
Schrödinger developed a way to mathematically and visually display the wave patterns of electrons. Surpassed Bohr's model. -
Werner Heisenberg
says the less precisely the momentum is known, the more precissely the atom was placed. -
Compton's pize
Compton wins a Nobel Prize "for his discovery of the effect named after him" -
Paul Dirac Equation
equation for the motion of the wave of an electron. -
Lois De Broglie won the Nobel Prize
Received the Nobel Prize on his wave nature of electrons discover. -
James Chadwick
Poves existence of the neutron. Is what accelerated the research in nuclear physics greatly. -
Heisenburg
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". -
Carl Anderson
Anderson took a clear shot of a positron shifting through a lead plat in the cloud chamber. -
Schrödinger
The Nobel Prize in Physics was awarded to Erwin Schrödinger "for the discovery of new productive forms of atomic theory" -
Paul Dirac wins Nobel
The Nobel Prize was awarded to Erwin Schrödinger and Paul Adrien Maurice Dirac "for the discovery of new productive forms of atomic theory" -
enrico Fermi
neutrons are decaying to a proton and emits an electron and a particle which he called a "neutrino" -
James Chadwick gets Nobel
The Nobel Prize was awarded to James Chadwick "for the discovery of the neutron". -
Irene Joliot-curie wins Nobel
The Nobel Prize was awarded to Irène Joliot-Curie "in recognition of her synthesis of new radioactive elements" -
Carl Anderson
The Nobel Prize was awarded to Carl David Anderson "for his discovery of the positron". -
Enrico Fermi's Nobel
Enrico Fermi received the Nobel Prize for "his discovery of new radioactive elements produced by neutron irradiation" -
Irene
reasearched the action of neutrons -
Otto Frisch
Otto Frisch works toward reaching nuclear fission. -
Otto Hahn, Fritz Strassman, Lise Meitner
produced Uranium nuclear fission -
Enricp Fermi
created controlled nuclear fission -
Frish
Figured out the correct way to produce Litlle Boy. -
Wolfgang Pauli recieves Nobel
The Nobel Prize was awarded to Wolfgang Pauli "for the discovery of the Exclusion Principle, also called the Pauli Principle". -
Quantum Electrodynamics
The theory called quantum electrodynamics, developed from work by Richard Feynman and Julian Schwinger. -
Broglie, Lab
Broglie became the first prestigious scientist to call for a multi-national laboratory -
Carl Anderson Mesotron
discovered cosmic radiation with a mass of about 200 electron masses, one-tenth of a proton, that is called a mesotron. -
the Quark
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.
