Atomic Theory

By bpm121
  • Antoine Lavoisier

    Antoine Lavoisier

  • Joseph-Louis Proust

    Joseph-Louis Proust

    Proved that the relative quantities of any given pure chemical compound’s constituent elements remain invariant, regardless of the compound’s source. This is known as Proust’s law.
  • Heinrich Hertz

    Heinrich Hertz

    He produced electromagnetic waves in the laboratory and measured their length and velocity.
  • Sir JJ Thomson

    Sir JJ Thomson

    Discovered the electron.
  • Max Planck

    Max Planck

    Originated quantum theory.
  • Marie and Pierre Curie

    Marie and Pierre Curie

    Won Nobel Peace Prize in Physics for discovery of radium and polonium in their investigation of radioactivity.
  • Sir JJ Thomson

    Sir JJ Thomson

    Won Nobel Peace Prize in Physics.
  • Ernest Rutherford

    Ernest Rutherford

    Won Nobel Peace Prize in Chemistry.
  • Ernest Marsden

    Ernest Marsden

    Reported that alpha particles from a radioactive source were occasionally deflected more than 90° when they hit a thin metal foil. This observation helped Rutherford develop the nuclear model of the atom.
  • Niels Bohr

    Niels Bohr

    Discovered that the atom consists of a heavy positively charged nucleus with substantially lighter negatively charged electrons circling around it at considerable distance.
  • Albert Einstein

    Albert Einstein

    Einstein completed his General Theory of Relativity.
  • Max Planck

    Max Planck

    Won Nobel Peace Prize in Physics.
  • Albert Einstein

    Albert Einstein

    Won Nobel Peace Prize in Physics.
  • Niels Bohr

    Niels Bohr

    Won the Nobel Peace Prize
  • Arthur Compton

    Arthur Compton

    The so-called Compton effect is caused by the transfer of energy from a photon to an electron.
  • James Chadwick

    James Chadwick

    He worked with Ernest Rutherford in the Cavendish Laboratory, Cambridge, where they studied the transmutation of elements by bombarding them with alpha particles and investigated the nature of the atomic nucleus, identifying the proton, the nucleus of the hydrogen atom, as a constituent of the nuclei of other atoms.
  • Louis de Broglie

    Louis de Broglie

    Broglie developed his revolutionary theory of electron waves.
  • Werner Heisenberg

    Werner Heisenberg

    Discovered a way to formulate quantum mechanics in terms of matrices.
  • Irene Joliot-Curie

    Irene Joliot-Curie

    Synthesized new radioactive elements.
  • Hans Geiger

    Hans Geiger

    He used his counter to confirm the existence of light quantum, or packets of energy.
  • Wolfgang Pauli

    Wolfgang Pauli

    Discovered that in an atom no two electrons can occupy the same quantum state simultaneously.
  • Arthur Compton

    Arthur Compton

    Nobel Prize for Physics for his discovery and explanation of the change in the wavelength of X rays when they collide with electrons in metals.
  • Paul Dirac

    Paul Dirac

    Relativistic quantum theory of the electron.
  • Louis de Broglie

    Louis de Broglie

    Won Nobel Peace Prize in Physics.
  • James Chadwick

    James Chadwick

    In 1932 Chadwick observed that beryllium, when exposed to bombardment by alpha particles, released an unknown radiation that in turn ejected protons from the nuclei of various substances. Chadwick interpreted this radiation as being composed of particles of mass approximately equal to that of the proton, but without electrical charge—neutrons.
  • Werner Heisenberg

    Werner Heisenberg

    Awarded the Nobel Prize for Physics.
  • Paul Dirac

    Paul Dirac

    Won Nobel Prize for Physics.
  • Erwin Schrodinger

    Erwin Schrodinger

    Won Nobel Peace Prize in Physics.
  • James Chadwick

    James Chadwick

    Received the Nobel Prize for Physics
  • Irene Joliot- Curie

    Irene Joliot- Curie

    Shared Nobel Peace Prize in Chemistry with her husband.
  • Carl David Anderson

    Carl David Anderson

    Won the Nobel Peace Prize for Physics his discovery of the positron, or positive electron, the first known particle of antimatter. In 1936 Anderson discovered the mu-meson, or muon, a subatomic particle 207 times heavier than the electron.
  • Enrico Fermi

    Enrico Fermi

    Won Nobel Peace Prize for Physics.
  • Lise Meitner and Otto Hahn and Fritz Strassman

    Lise Meitner and Otto Hahn and Fritz Strassman

    Became the first to recognize that the uranium atom, when bombarded by neutrons, actually split.
  • Otto Frisch

    Otto Frisch

    Described the division of neutron-bombarded uranium into lighter elements and named the process fission.
  • Wolfgang Pauli

    Wolfgang Pauli

    Won Nobel Peace Prize in Physics.
  • Richard Feynman and Julian Schwinger

    Richard Feynman and Julian Schwinger

    Co-winners of the Nobel Peace Prize in Physics.