The Atom

  • Jan 1, 1000


    In 400 B.C. Democritus proposed the idea that matter was not infinitely divisible
  • Jan 1, 1000


    368 B.C.
    Developed the scientific method
  • Jan 1, 1000

    First use of nail polish

    First use of nail polish
    In 3000 B.C. China ladies came up with the invention of nail polish. They used flower petals and alum to make nail polish.
  • Antoine Lavoiser

    Antoine Lavoiser
    First Law of Conservation of Mass
    -The total mass in a chemical reaction remains constant
  • Joseph Proust

    Joseph Proust
    Law of Definite Porportion
  • William Crooks

    William Crooks
    Cathode Ray: Led to discovery of television
  • John Dalton

    John Dalton
    Came up with the Atomic Theory: All matter is composed of extremely small particles called atoms, different atoms combine in simpler whole number ratios to form compounds
  • Amedeo Avogrando

    Amedeo Avogrando
    First to propose that a gaseous element, oxygen, hydrogen, and nitrogen are diatomic molecule
  • Deoderany

    The inventor was from Philidelphia, The inventor trademarked his invention
  • J.J. Thomson

    J.J. Thomson
    Came to conclusion that the mass of the charged particles was much less then that of a hydrogen atom
  • First basketball game played

    First basketball game played
    It was invented by James Naismith and it was played at Springfield College.
  • The Game of Volleyball

    The Game of Volleyball
    It was invented by William G. Morgan
  • Henri Becquerel

    Henri Becquerel
    Natural radioactivity
  • Marie Curie

    Marie Curie
    Isolates pure radium for the first time
  • Max Planck

    Max Planck
    Recognized significance of the theory of relativity
  • Albert Einstein

    Albert Einstein
    Theory of Relativity, atomic bond
  • Hair Dye

    Hair Dye
    Hair dye was invented by Eugene Schueller, the same guy who invented sunscreen
  • Robert Millikan

    Robert Millikan
    Determined charge of an electron
  • Ernest Ritherford

    Ernest Ritherford
    Concluded there was a nucleus and made a new nuclear atomic model
  • Henrey Moseley

    Henrey Moseley
    Discovered that atoms of each element contain a positive charge in their nuclei
  • Niels Bohr

    Niels Bohr
    Published his model of the atomic structure
    -Introduced the theory of electrons
  • Q- Tips

    Q- Tips
    Q-tips were invented by Leo Gerstenzang. He decided to make q-tips after he saw his wife wrap cotton on a toothpick.
  • Louis de Brogile

    Louis de Brogile
    Electrons could behave as waves under some conditions
    Helped scientists understand that the atom didn't behave like the solar system
  • Werner Heisenberg

    Werner Heisenberg
    Quantom mechanics
    -Radiation emitted by the atom
  • Erwin Schrodinger

    Erwin Schrodinger
    Made an equation
  • James Chadwick

    James Chadwick
    Showed the nucleus contained a neutron
  • Sunscreen

    It was invented by Franz Greiter. It had an SPF of 2.
  • McDonald's

    The original McDonald's was founded in 1940. McDonald's didn't avcually open until 1955.
  • Hairspray

    It was developed from a resin-like substance that resembled shellac.
  • Pizza Hut

    Pizza Hut
    It was founded by brothers, Dan and Frank Carney in their hometown Witchita, Kansas