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460
Democritus
The Democritus Atomic Theory revolves around the atoms that are present in the atmosphere. -
Period: 460 to
Atomic Theory Project
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Dalton
Democritus was a Greek philosopher, and therefore, never backed up any ideas with experimentation. Dalton's approach to science involved experimentation and measurements and the attempt at explaining what he observed -
Thomson
He discovered the electron in an atom while studying "cathode rays". -
Rutherford
Rutherford was a scientist who discovered established the nuclear structure of the atom and the essential and nucleus.ature of radioactive decay as a nuclear process. -
James Chadwick
James Chadwick proved the existence of the neutron in 1932 which is what accelerated the research in nuclear physics greatly. -
de Brogile
Among other things he postulated that all particles have a wave nature. -
Electron model was invented
The electron cloud model was invented throughout the 20th century. (1900's) Yet after neils bohrs model in 1913 -
Bohr
Bohr's theory of the atom and its quantum structure.
The theory of complementarity, which helps explain wave/particle duality -
Aristotle
He was not able to see how atoms could stay in perpetual motion and he developed a theory based upon the four elements. He claimed Aristotle’s theory made a great generalization off all matter being made of the four elements: fire, water, earth, and air.