History of the atom

Democritus (400BC)

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Was the first person to discover the atom, said that everything is made up of atoms. also said that if you keep cutting a peice of something you will end up with an atom.He used his sences to figure this out. "Democritus Atom." Universe Today RSS. N.p., n.d. Web. 26 Feb. 2014.

Airostotle (340BC)

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Didn't beleive in the atom, felt that the four elements created the world. He used just observed to figure this out. "HISTORICAL OUTLINE of the Atomic Theory and the Structure of the Atom." HISTORICAL OUTLINE of the Atomic Theory and the Structure of the Atom. N.p., n.d. Web. 25 Feb. 2014. "Aristotle." The-History-of-the-Atom -. N.p., n.d. Web. 27 Feb. 2014.

Dalton

Feb 27, 1803

That all matter is made of atoms, all of a gimen element identical in mass and properties, compounds fromed by a combination to two different atoms, and chemical is a rearrangement of atoms.

Thomson

Feb 27, 1890

Able to determine the mass to charge ratio for an electron,