When an ancient Greek asked if an object could be subdivided indefinitely, some said yes and some said no. Neither side had any physical evidence for their point of view, nor did they seek any. The only contribution to modern science, apart from the question itself, was the word atomos (indivisible) that Democritus used in the debate. John Dalton made a contribution of a quite different order. He said that matter did consist of atoms; he said that all atoms of the same element were identical atoms with the same mass. He cited physical (that includes chemical) evidence to support his assertions. Dalton said more about atoms, but all based on evidence, rather than opinion. Democritus's theory was philosophy. Dalton's was science as we understand it today.
Democritus achievements are his atomic theory and his book -on the little order of the world- which describes his atomic theory.
democritus was greek philosophers.
The term used by Democritus to identify the particles of an element is atomic theory. It was thought up by John Dalton between the years 1766 and 1844.
The ancient Greeks did not perform any experiments to test the atomic theory proposed by Democritus. To the ancient Greeks the atomic theory was a part of philosophy, not science.
By using experimental methods Dalton transformed Democritus ideas on atoms into a scientific theory.
Democritus lived between approx. 460 bc and approx. 370 bc.
Democritus achievements are his atomic theory and his book -on the little order of the world- which describes his atomic theory.
democritus was greek philosophers.
The atomic hypothesis (not discovery) of Democritus is from approx. 400 BC.
Democritus created the "Atomic Theory" and he was also a teacher.
democritus
They both thought the same theory but Dalton had evidence to prove it, unlike Democritus.
the atomic theory of the universe
The term used by Democritus to identify the particles of an element is atomic theory. It was thought up by John Dalton between the years 1766 and 1844.
460 b.C
Democritus
400b.C.