How did the concept of the atom change from the time of Democritus to the time of John Dalton?

How did the concept of the atom change from the time of Democritus to the time of John Dalton? Democritus reasoned that atoms were indivisible and indestructible. By using experimental methods, Dalton transformed Democritus’s ideas on atoms into scientific theory. 1 How did the concept of atom evolved from ancient Greek to present?

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