Leukippos and his student Demokritos proposed intuitively the atomic theory of matter. Some ideas are also in old Sanskrit writings.
For the entire history see the link below.
The first European credited with the atomic theory of matter is John Dalton, an English chemist, and physicist. Dalton proposed his atomic theory in the early 19th century, stating that all matter is made up of tiny, indivisible particles called atoms.
John Dalton is credited with developing the first scientific atomic theory in the early 19th century. He proposed that all matter is made up of tiny particles called atoms, which are indivisible and have specific properties. Dalton's atomic theory laid the foundation for modern chemistry.
The work of John Dalton is credited with being the beginning of modern atomic theory. In the early 19th century, Dalton proposed that all matter is composed of indivisible particles called atoms, each with its own unique properties. His atomic theory laid the foundation for our understanding of elements and compounds.
scientific method used in the development of atomic theory
John Dalton first pursued research into atomic theory. He was the first person to propose the existence of the atomic structure.
John Dalton
The atomic theory of matter can be attributed to the ideas proposed by the ancient Greek philosopher Democritus. He hypothesized that all matter is composed of indivisible and indestructible particles called atoms, which differ in shape, size, and arrangement. Democritus' atomic theory laid the foundation for modern atomic theory.
John Dalton is credited with proposing the atomic theory, which states that all matter is made up of small indivisible particles called atoms.
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.
Dalton's Atomic Theory
That is Quantum Theory.
That is Quantum Theory.