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Dalton
He stated that elements combine at atomic levels with fixed ratios because compounds cause variations in them because of their own weight. He also created he 5 principles of elements.
He made his discovery from a series of experiments that provided evidence. WILLIAMS, MATT. "John Dalton's Atomic Model." Universe Today. N.p., 01 Dec. 2014. Web. 20 Feb. 2015. http://www.universetoday.com/38169/john-daltons-atomic-model/. -
Thomson
He discovered that atoms included electrons and they were smaller than atoms.
His discovery was made based upon a famous expirement known as the "Cathode Ray Tube Experiment" which lead to the well known Plum Pudding Model Stuewer, Roger H. "World Book Online Reference Center | Online Reference Book| Online Encyclopedia." World Book. N.p., n.d. Web. 25 Feb. 2015. http://www.worldbookonline.com/advanced/article?id=ar555560&st=thomson. -
Ruherford
He said that it has a nucleus.
He figured this out by gathered evidence from experiments. DeWitt, Taylor. "GaggleTube Video - Discovery of the Nucleus: Rutherford's Gold Foil Experiment." GaggleTube Video - Discovery of the Nucleus: Rutherford's Gold Foil Experiment. N.p., n.d. Web. 20 Feb. 2015. -
Bohr
He said electrons existed in set orbits around the nucleus.
He figured this out by gathered evidence from experiments . "Bohr Model." Bohr Model. NCS Pearson, 2014. Web. 23 Feb. 2015. -
Schrodinger
He said that electrons are spaced out instead of closely packed.
He figured this out by using mathematical models. **** "Schrödinger's Atom." Schrödinger's Atom. N.p., n.d. Web. 23 Feb. 2015.
****"Schrodinger Atom Model - Viewing Gallery." Schrodinger Atom Model - Viewing Gallery. N.p., n.d. Web. 23 Feb. 2015. -
Democritus
He said the atom was the basic building block that made up all other matter.
He figured this out through curiosity and observations. "What Democritus Thought." Democritus Model. Linda Bennett, n.d. Web. 18 Feb. 2015. http://edtech2.boisestate.edu/lindabennett1/502/democritus.html. -
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