Atomic Theory

  • 384

    Aristotle

    Born in Stageira, Chalcidice.
    Rejected Democritus. Atoms don't move through empty space.
    No experiments.
    Philosopher
    Airstotle means "The Best Purpose."
  • 460

    Democritus

    Lived In Abdera, Thrace.
    Stated that atoms were invisible.
    No experiments.
    Philosopher.
    Liked to travel.
  • George Washington is born

  • Antoine Lavoisier

    Born in Paris.
    Discovered oxygen and Law of Conservation of Mass.
    Chemist.
    Proved that products in a reaction are equal to mass of reactants.
    Got his head chopped off during Revolutionary War.
  • Joseph Proust

    Lived in Angers, France.
    Discovered that chemical substances only truly combine to form a small number of compounds.
    Proust studied copper carbonate and created gold from zinc.
    Chemist.
    Napoleon invaded Spain and burned Prousts labratories.
  • John Dalton

    Born in Quakerfield, England.
    Discovered that total pressure of mixture of gases is sum of individual components of mixture.
    Chemist, meteroligist, and physicist.
    Experimented with how much water vapor could be absorbed by air at different temperatures.
    Used to be an English teacher.
  • Revolutionary war started

  • Declaration of independance is signed

  • The guitar was invented

  • The contitution was signed

  • Julius Plücker

    Born in Elberfeld, Duchy of Berg.
    Julius built one of the first gas discharge tubes ("cathode ray tube").
    No Experiments
    Mathematician.
    Julius was influenced by geometry.
  • James Clerk Maxwell

    Born in Edinburgh, Scotland.
    Proposed electric and magnetic fields filled the void.
    No experiments.
    Physicist.
    Maxwells parents did not marry untill there late 30's.
  • William Crookes

    Born in London, England.
    Crooks built a low-pressure discharge tube used to study the properties of cathode rays.
    No experiments.
    Physical Chemist
    Worked in phisics and chemistry.
  • Willhelm Rontgen

    Born in Lennep, Germany.
    Discovered X-Ray.
    Used passing of electric current through gases at exremely low pressure.
    X-Ray astronomer and Physicist.
    Earned first nobel prize.
  • Wilhelm Röntgen

    Born in Lennep, Rhine Province, Germany.
    Wilhelm discovered X rays.
    He observed the fluorescence they produced.
    Physicist
    He went to boarding school.
  • Henry Becqueral

    Born in Paris.
    Discovered radioactivity.
    Thought that phosphorescent materials could emit penetrating X-ray like radiation.
    Chemist.
    SI for radioactivity is named after him.
  • Niels Bohr

    Born in Copenhagen, Denmark.
    Niels introduced the Bohr Model of the atom in 1913.
    Discovered the futher away an electron is from the nucleus the more energy it has.
    Physicist.
    Two of Bohrs sons died at an un rightful age
  • J.J. Thompson

    Born in Manchester, England.
    Discovered electrons and isotopes.
    Used a magnetic field to see how cathode rays were deflected.
    Won Nobel Prize in 1906.
  • Max Planck

    Born in Kiel, Horstein.
    Came up with the quantum theory.
    No experiments.
    Physicist.
    Lived during World War 1.
  • Abraham Lincoln is assinated

  • Marie Curie

    Born in Warsaw, Poland.
    Discovered theory of "radioactivity", techniques for isolating radioactive isotopes.
    No experiments.
    Physicist and Chemist.
    Named "Polonium" after Poland.
  • Robert Millikan

    Born in Morrison, Illinois.
    Determined the size of an electron.
    Performed the "Oil Drop Experiment".
    Physicist
    Has a school named after him in California.
  • Ernest Rutherford

    Born in New Zealand.
    Discovered half-life.
    Chemist and Physicist.
    Used postively-charged particles and tried to make them run through piece of gold foil. This proved that atom is mostly empty space.
    Every time he applied for a job he was denied.
  • Lise Meitner

    Born in Vienna, Austria-Hungary.
    She first identified nuclear fission.
    During one of her experiments uranium started emitting radioactive energy.
    Physicist
    Lise was born into a jewish family.
  • Albert Einstein

    Born in Ulm, Germany.
    Einstein devised a mathematical method for calculating the size of atoms and molecules.
    Einstein anylized sugar molecules in water and calculated the diameter in atoms and moecules.
    Physicist.
    Einstein could not talk until the age of four.
  • The first modern automobile was invented

  • Erwin Schrodinger

    Born in Vienna, Austria-Hungary
    He proposed that electrons are arranged in concentric circular orbits around the nucleus.
    Schrödinger used mathematical equations to describe the likelihood of finding an electron in a certain position.
    Physicist.
    Schrodingers dads name is Rudolf.
  • Henry Moseley

    Born in Weymouth, Dorset.
    Arranged the periodic table of the elements.
    Bombarded each of elements with cathode ray tube.
    Chemist
    Left research behind when World War 1 began.
  • Adolf Hitler is born

  • Hitler was born

  • James Chadwick

    Born in Bollington, Cheshire.
    Discovered neutron of atom.
    Noticed that atom didn't have a positive charge, so he concluded that it was neutral.
    Physicist
    Helped develop the two atomic bombs used in World War 2.
  • Louis De Broglie

    Born in Louveciennes, France
    He proposed in 1924 that electrons could behave as waves under some conditions.
    He asked himself how the discrete states could be understood by the aid of current concepts.
    Physicist.
    He offered his services to the army to help with radio communication.
  • Enrico Fermi

    Born in Rome, Italy.
    Conducted the first controlled chain reaction releasing energy from the atoms nucleus.
    No experiments.
    physicist.
    He was an elementary school teacher.
  • Oscar Mayor weiners were invented

  • Murray Gell-Mann

    Born in Manhattan, New York City
    Proposed the existence of a new level of elementary particles - quarks.
    Scientists forced a stream of high-speed electrons through a hydrogen atom and were able to detect the quarks within.
    Physicist.
    Gell-Mann got into yale at the age of 15.
  • Jerry Garcia is born

  • Jimi Hendrix is born

  • Pearl harbor

  • Stevie Ray Vaughan was born

  • Hawaii became a state

  • Trey Anastasio is born

  • Man first stepped foot on the moon

  • Woodstock

  • The Wall by Pink Floyd came out

  • Internet available to the common public

  • Connor Loveless was born

  • 9/11

  • Facebook was realeased