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Atomic Theory - Coggle Diagram
Atomic Theory
Democritus 400 BC
Dalton 1803
Mendeleev 1869
Created the periodic table of elements, his period law states that "plysical and chemical of the elementare periodic fuctions of their atomic numbers"
Eugene Goldstein 1885
Discovered positive particles. He noted that the particles had a charge equal and opposite to the electron.
Henri Becurel 1896
Discovered radioactivity, which earned him a nobel prise. Also discovered that rays emitted from uranium caused fases to ionize.
J.J. Thomson 1897
Discovered the electron. He experimented by testing and studying the nature of electic discharge in high vacuum cathode-ray tube
Ernest Rutherford 1907
Used the gold foil experiment to discover the modern model of an atom. He concluded that all positive charges were centralized, while negative electrons orbit the nucleus
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Agreed that things were created by atoms which he believed were indestructible. He also stated that compounds are created by combining two atoms.
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