History of Atom by Tyrese Wilson

By tyrese.wilson2018
  • 470

    Democritus (460 to 370)

    Democritus (460 to 370)
    Argued a theory that everything is made up of indivisible, indestructible atoms that are infinite in number. Said between atoms lies empty space and atoms differ in size,shape, and position. Also said atoms will always be in motion. Thought of this theory.
    Coffey, Jerry. "Democritus Atom." Universe Today. N.p., 22 Mar. 2010. Web. 19 Feb. 2015
  • Period: 470 to

    History of Atoms by Tyrese Wilson

  • Dalton

    Dalton
    After gathered evidence from experiments.Dalton said each element consisits of a particular kind of atom and varying properties of the elements contribute ot the differences in their atoms. He said that each element is identical in size,shape, and mass and when they combine, they form a particular compund they combine in a specific numerical ratio.The composition by mass of a compound is always the same.
    Saffman, Mark. "Atom." Worldbookonline. Worldbookonline, 19 Feb. 2015. Web.

  • Thomson

    Thomson
    When studying rays. Thomson discovered atoms are cuttable, He discovered elctrons and said electrons are embedded in a positevely charged sphere.
    Saffman, Mark. "Atom." Worldbookonline. Worldbookonline, 19 Feb. 2015. Web.

  • Rutherford

    Rutherford
    After the results of an experiment. Rutherford conteded that nearly all the mass of the atom is concentrated in a tiny nucleus and nucleus is positevely charged and surrounded by negatively charged electrons traveling at tremeundous speeds at different regions.
    Saffman, Mark. "Atom." Worldbookonline. Worldbookonline, 19 Feb. 2015. Web.

  • Bohr

    Bohr
    After looking at Rutherford's model. Bohr contended that electrons existed in set larger orbits around the nucleus and this is the key to periodic repetition of elements. The outermost orbit determined chemical properties.
    Saffman, Mark. "Atom." Worldbookonline. Worldbookonline, 19 Feb. 2015. Web.

  • Heisenburg and Schrodinger

    Heisenburg and Schrodinger
    By studying light given off atoms. Heisenburg and Schrodinger came up with the uncertainty principle.This states that the subatomic particle's(smaller pieces that make up atoms) c position and momentum cannot be decided accurately at the same time.
    Cassidy, David C. "Heisenberg, Werner." World Book Advanced. World Book, 2015. Web. 25 Feb. 2015.