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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 particleWerner Heisenberg writes "Quantom Mechanics"Antoine Lavoisier proposes the Combustion Theory
Proved that combvustion involves oxygen primarilyAntoine Lavoisier discoveres water is not an elementAmedeo 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 moleculesAvogadro'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 modelHenry Moseley improves the periodic tableJohn Dalton develops atomic theory invisible solid sphere modelDmitri Mendeleev predicts elements before the periodic tableEugene Goldstein discovers the protonJJ 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 radiumRutherford conducts the Gold Foil Experiment (discovers radioactivity)Rutherford proposes his nuclear modelMax Planck establishes "Planck’s Constant"
(6.62607004 × 10-34 m2 kg / s)Francis Willian Aston invents mass spectographHeisenburg developes the uncertainty principleJames Chadwick discoveres the neutronErwin Schrodinger creates formula to predict movement of electronsNikola Tesla develops "Tesla’s theory"Erwin Schrodinger develops the electron cloud model
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