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322
Aristotle Atomic Model
Aristotle believed that all matter was made up either of one of the elements of water air earth and fire or combinations of these four elements, with the exception of stars and planets which were made of aether. -
350
Democritus Atomic Model
The theory of Democritus held that everything is composed of "atoms", which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible; have always been, and always will be, in motion; that there are an infinite number of atoms, and kinds of atoms. -
John Dalton Atomic Theory
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J. J. Thomson Atomic Model
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Ernest Rutherford Atomic Model
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Neils Bohr
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James chadwick