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Atoms...
Atoms... Pt. 2
Theory
Democritus proposed (around 440 BC)...
Aristotle disagrees. He thought (around mid 300 BC, after Democritus)...
about 2000 years have passed.
What are combined elements with a constant mass ration called?
Dalton’s Theory Stated...
So, is the atom really the smallest particle ?
Thompson experimented with the cathode ray tube and discovered...
A Few Years Later...
Niels Bohr
Electron Clouds and Current Theory
Chadwick...1932
History of the periodic table...
