Cassidy Young, Trent Lloyd

By Cassidy.Young2017
  • 300

    Aristotle B.C.

    Aristotle B.C.
    Saffman, Mark. "atom" Worldbook Advanced. World Book, 2014 Web. Feb. 28 2014
    • Aristotle basically rejected the whole theory of Democritus.
  • 460

    Democritus B.C

    Democritus B.C
    Saffman, Mark. "atom" World Book Advanced. World Book, 2014. Web. 27 Feb. 20141. Democritus helped develop the philosophy of atomism.
    He actually came up with the name "atom" - meaning uncuttable.
    1. He had more or less, just a theory, about atomic structure.
      They didn't have the technologoy to see particles that small. This is probably why he thought they were inivsible.
    2. His theory was that atoms were tiny, hard, and all made of the same substance.

  • Dalton

    Dalton
    Saffman, Mark. "atom" World Book Advanced. World Book, 2014. Web. 27 Feb. 2014
    1. His theory is that each element is made of its own type of atoms.
    2. His theory was used to explain how chemists in the late 1700s would combine elements to produce compounds byt only in fixed proportions.
    3. He thought that all atoms of a certain element have indentical mass, shape, and size.

  • Rutherford

    Rutherford
    Saffman, Mark. "atom" WorldBook Advanced. World Book, 2014. Web. 28 Feb. 2014
    1. He discovered that almost all of the mass of an atom is centered in a small neucleus. His theory also said that the neucleus is surrounded by the electrons moving at extremely fast speeds. 2. He ran experiments shooting thin sheets of gold with alpha particles. The majority of the particles pasted through the gold sheets. 3. - (cant fit #3)

  • Bohr

    Bohr
    The History of the AtomStanley, Matthew. "Bohr Niels" WorldBook Advanced. World Book, 2014. Web. 28 Feb. 2014. 1. Bohr proposed that electrons traveled in certain orbits around the neucleus. His theory also claimed that the outter orbits have more electrons than the inner ones. 2. He presented the Bohr Atomic Model that says Atoms absorb or give off radiation only when electrons jump between allowed and stationary states.

  • Heisenberg and Schrodinger

    Heisenberg and Schrodinger
    1. Heisenberg presents the uncertainty priciple stating that a particle's position and momentum cant be determined at the same time with any accuracy.
    2. He studied the light given off by atoms which lead him to develop matrix mechanics that provides a mathematical description of electron orbits.

  • Thomson

    Thomson
    <a href='http://WorldBookOnline.com' >Primack, Joel R. "Electron" WorldBook Advanced. World Book, 2014. Web. 28 Feb. 2014.
    1. He discovered the electron and that atoms are cuttable. He learned the rays were light weight particles with a negative charge.
    2.He observed rays that that happened when electricity went through glass tubes in a vacuum. He thought that the rays small particles of matter.
    3. He thought that the electrons were part of the atom. - (no more room to type the rest.)