August 31, 2020
For educational institutions
Atomic Model Timeline
⟶ Updated 12 Oct 2018 ⟶
List of edits
Francis William Aston discovers many Isotopes Discovers types of radium and many more.
Pauli's Exclusion Theory States that no two electrons can be in the same quantum space.
Werner Heisenberg Developes the uncertainty Principle A variety of mathematical inequalities asserting a fundamental limit to the precision with a particle
Werner Heisenberg writes "Quantom Mechanics"
Antoine Lavoisier proposes the Combustion Theory Proved that combvustion involves oxygen primarily
Antoine Lavoisier discoveres water is not an element
Amedeo Avogadro V/N=k V= volume of gas N= Amount of gas k= Constant equal volumes of all gases, at the same temperature and pressure, have the same number of molecules
Avogadro's Constant 6.02214086 × 1023 mol-1 The proportionality factor that relates the molar mass of a substance to the mass of a sample.
Neils Bohr presents his new atomic model
Henry Moseley improves the periodic table
John Dalton develops atomic theory invisible solid sphere model
Dmitri Mendeleev predicts elements before the periodic table
Eugene Goldstein discovers the proton
JJ Thompson influences the plum pudding model of the atom.
Lavoisier develops the fundamental laws of chemical transformation Law of conservation of mass "mass is neither created nor destroyed during a reaction”
Marie Curie succesfully isolates radium
Rutherford conducts the Gold Foil Experiment (discovers radioactivity)
Rutherford proposes his nuclear model
Max Planck establishes "Planck’s Constant" (6.62607004 × 10-34 m2 kg / s)
Francis Willian Aston invents mass spectograph
Heisenburg developes the uncertainty principle
James Chadwick discoveres the neutron
Erwin Schrodinger creates formula to predict movement of electrons
Nikola Tesla develops "Tesla’s theory"
Erwin Schrodinger develops the electron cloud model
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