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John Dalton
John Dalton (although suffering from deuteroanopia) proposed what is called the "Billiard-ball" model. The billiard-ball model depicts atoms as the smallest form of matter, with diferent atoms having different sizes. Special Thanks to: http://en.wikipedia.org/wiki/John_Dalton#Five_main_points_of_Dalton.27s_atomic_theory -
electrolysis
In 1800 the first traces of hydrolysis were found when William Nicholson and Johann Ritter seemed to accidentally stumble upon it. Special Thanks to: http://en.wikipedia.org/wiki/Electrolysis -
Mandeleev's Periodic Table
Dmitri Ivanovich Mendeleev published a catagorization of the known elements of the time into a chart. Special Thanks to: http://en.wikipedia.org/wiki/Periodic_table -
J.J. Thompson
J.J. Thompson propesed this model before the discovery of the nucleus. Alternatively called the "Plum pudding" model. The plum pudding model shows a positively charged cloud that holds all of the electrons in it, making a neutrally charged atom as a whole. Special Thanks to: http://en.wikipedia.org/wiki/Plum_pudding_model -
Ernest Rutherford
Ernest Rutherford created a new atom model to disprove J.J. Thompson's model. This model differs from the plum-pudding model by having a positevely charged nucleus, but other than that, it doesn't really explain how electrons behave. Special Thanks to:http://en.wikipedia.org/wiki/Rutherford_model -
Isotopes
Isotopes were suggested as a possibility in 1912 by Frederick Soddy. Special Thanks to: http://en.wikipedia.org/wiki/Isotope -
Niels Bohr
Niels Bohr introduced a new atom model in 1913. Along with the new model, there were many new equations dealing with energy-levels and whatnot. The model shows a nucleus with electrons orbiting in shells with varying energy levels. Special Thanks to: http://en.wikipedia.org/wiki/Bohr_model -
Nuclear Fission
In 1938 Nuclear Fission was discovered by Otto Hahn and Fritz Strassmann. Special Thanks to: http://en.wikipedia.org/wiki/Nuclear_fission#History -
Nuclear Fussion
Nuclear fusion was first tested in 2009 Special Thanks to: http://en.wikipedia.org/wiki/Nuclear_fussion