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100
Democritus ( 430b.c.)
The Idea that matter is made up of tiny particles
He had no proof
He knew thet matter was made up of tiny particles
430 B.C. Scorces : textbook and Democritus Atom Model. Digital image. N.p., n.d. Web. 25 Feb. 2014 -
100
Aristotle ( 200 B.C. )
Aristotle belived it was made of elements
HE only had his theory -
Dalton
He discoverd that the atom was made up of tiny particles
He also had no proof it was just a theory Scorces: Textbook and Dalton Atomic Theory." Royal Society of Chemistry, the Largest Organisation in Europe for Advancing the Chemical Sciences. Royal Society of Chemistry, n.d. Web. 25 Feb. 2014. -
Thompson
He discovered electrons
He amde a modle with a loaf of bread and rasins the loaf repersenting the positive atom and the rasins as the Electrons Scorces:Textbook and http://www.kutl.kyushu-u.ac.jp/seminar/MicroWorld1_E/Part2_E/P24_E/Thomson_model_E.jpg -
Rutherford
He discovered the nucleas he showed it had most of the mass
He shot atoms at gold foil
We know that every atom has a Nucles which contains 99% of its mass
Scorces: Textbook and http://www.rsc.org/chemsoc/timeline/graphic/1911_gfoil_01.jpg -
Bohr
He discovered energy between bonds Scorces:Neils Bohr - Atomic Model." Royal Society of Chemistry, the Largest Organisation in Europe for Advancing the Chemical Sciences. N.p., n.d. Web. 25 Feb. 2014. -
Heisenburg and Schrodinger
They said that a particles position momentum energy and time can never be presisley known at the same time
They observed the electron and it looked fuzzy because it was never in one particular spot
Was called the uncertanty principal That on much smaller scale an electron has no definate shape or position
Scorce: Textbook and Electron Arrangement and Schrodinger's Atomic Model." Solar Power Facts: A Brighter, Cleaner Future. N.p., n.d. Web. 25 Feb. 2014
