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460
Democritus
460-370 B.C was the first person to propose the idea tha matter was not infinitely ndisible. -
John Dalton
1766-1841 a school teacher in England marks tthe beginning of the development of the modern atomic the theory. -
J.J thomson
1856-1940 began a series of cathode ray tube experiments in the late 1980s to determine the ratio of its charge to its mass. -
Gold Foil Experment
was an experiment to probe the structure of the atom performed by Hans Geiger and Ernest Marsden in 1909, -
Cathode Ray Tube
The accidental discovery of the cathode ray led to the invantion of one of the most important technoligical and social developments of the 20th century the television scientists continued their research used cathode ray tubes and buy the end of the 1880s they were fairy convinced.
