During the 1600s and 1700s there was this theory that matter was made of small, invisible particles, which was given final conclusion by John Dalton.
John Dalton
In the 17th and 18th century, there was ongoing research or study on the theory of matter, the first breakthrough came with Evangelista Torricelli who discovered that Air has weight, and than Daniel Bernoulli developed the theory that air and gases consist of tiny particles.
It was John Dalton who put end this quest with the theory that All matter is made of elements. Dalton's theory was the first pure attempt to give importance to the role of Atoms.
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