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350 BCE
Greek era 350 BC Democritus
His theory was not regarded because it defined many people and Gods
He was Largely ignored in the time of the ancient Athens Democritus is said to have been disliked so much by Plato that the latter wished all of his books burned.
His theory was '' The universe is composed of two elements: the atoms and the void in which they exist and move.''
He was mentored and His mentor, Leucippus, originally came up with the atomic theory, with he improved and expanded and developed -
1 BCE
atomic Model Timeline