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Aristotle disbelieved in the theory of atoms. Instead he believed in the four elements: air, water, fire and earth.
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Democritus' theory concluded that everything is acomposed of atoms and "physically, but geometrically, indivisible".
He used mathematical models or drawings distinguished by size, shape, and by their parts. -
"1) Elements are made of extremely small particles called atoms
2) Atoms of a given element are identical in size, mass, and other properties
3) Atoms cannot be subdivided, created, or destroyed
4) Atoms of different elements combine in simple whole-number ratios to form chemical compounds
5) In chemical reactions, atoms are combined, separated, or rearranged" -
Discovered that electrons were neighboring the nucleus. Did not discover electrons were in an orbital pattern.
He found it by experimenting with electricity in tubes.
He then created a model for atoms called "The Plum Pudding Model" -
Theorized atoms were made up like the solar systems. Also said the heavy part in the middle is called a neucleus in the middle of each atom.
Created a science experiment called "The Gold Foil Experiment" -
Added to Rutherford's theory how atoms give off radiation. Consisted of extremely small positive charged nucleus.
Performed numerous experipents on the hydrogen element. -
Subatomic particles, the small parts create atoms. Doing more research Schrodinger created the function for the quantum theory.
They made their discovery through a series of experiments at quantum level.
