1 Jan 1803 Jahr - JOHN DALTON (1766-1844 CE) date of discovery (1803 CE) All matter is made up tiny indivisible particles called atoms (solid, hard, impenetrable, movable particles) where different atoms of elements are spheres of different sizes and colors. His atomic model provides much of the framework that is used in modern chemistry efforts.
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1 Jan 1803 Jahr
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~ 222 years ago