History of Chemistry

By qsbaugh
  • John Dalton

    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:
  • 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:
  • Mandeleev's Periodic Table

    Mandeleev's Periodic Table
    Dmitri Ivanovich Mendeleev published a catagorization of the known elements of the time into a chart. Special Thanks to:
  • J.J. Thompson

    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:
  • Ernest Rutherford

    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:
  • Isotopes

    Isotopes were suggested as a possibility in 1912 by Frederick Soddy. Special Thanks to:
  • Niels Bohr

    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:
  • Nuclear Fission

    In 1938 Nuclear Fission was discovered by Otto Hahn and Fritz Strassmann. Special Thanks to:
  • Nuclear Fussion

    Nuclear fusion was first tested in 2009 Special Thanks to: