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460 BCE
Ancient Greek Models Of Atoms
Democritus: Believed that all matter consisted of extremely small particles that couldn't be divided, and called them atoms -
Period: 460 to
Dalton and Democritus's Atomic Model
Dalton and Democritus both had the same idea when it came to the model of an atom ; A sphere that couldn't be divided -
John Dalton's Idea of an Atom
John Dalton thought that all elements are composed of atoms and like Democritus he believed that atoms couldn't be divided. -
Thomson's Atomic model
When passing a negatively charged beam through gases at low pressure he discovered electrons because the particles bent towards a positively charged plate. This made him realize that atoms must contain charged particles.
His model was the plum pudding model
