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  Around 400 BCE, Democritus claimed that everything is made up of atoms and that iron atoms had hooks to hold them together. "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014
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  Dalton discovered things can be broken down into elements. He added that atoms are small things that have different mass and properties, "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014.
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  Thomson discovered that atoms have electrons. "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014.
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  Discovered that atoms have a nucleus. And that stoms looked like empty space. "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014.
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  Bhor's theory clamied that electrons act like planets around the nucleus. (atoms spin in an orbit.) "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014.
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  Discovered that electrons spin all around the nucleus; like hyperactive flies. "GaggleTube Video - Models of the Atom Timeline." GaggleTube Video - Models of the Atom Timeline. GaggleTube, n.d. Web. 25 Feb. 2014.
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  Around 384 BCE, Aristotle declared that no matter how many times you cut a piece of matter, there will always be a smaller piece. He thought atoms looked like models and everything was made up of the four elements.