Yes he did
John Dalton did not have experimental evidence to support his theory of the atom when he first proposed it in the early 19th century. His model was based on a philosophical approach rather than direct experimental observations.
scientific method used in the development of atomic theory
John Dalton because Dalton predicted new combinations of elements; these new combinations were found providing evidence that Dalton's theory worked.
John Dalton is typically not credited with creating the first atomic theory because other scientists before him, such as Democritus and Antoine Lavoisier, had proposed ideas about the atom. Dalton's theory, however, was more comprehensive and backed by experimental evidence, which led to its widespread acceptance in the scientific community.
The first person to develop the first model of the atom in 1803 was John Dalton.
Democritus did not do any experiments or provide solid evidence for his theory on the atom. In the 5th century B.C, Democritus proposed an atomic model in which all matter is made up of small indestructible units called atoms.
First Battle of Dalton happened on 1864-02-22.
The Greek philosopher Democritus first put forward the idea of atoms as an intellectual theory.
Instead of just stating his own personal opinions John Dalton cited evidence to support his atomic theory. The giving of evidence - which could be proved or disproved by others - was what soon resulted in his theory being accepted by scientists.
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John Dalton worked in the first years of the 19th century.