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Period: 400 to
Atomic Timeline Theory
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440
Democritus
Created the Atomic Theory. -
Antoine Lavoisier
Named Oxygen and predicted silicon. He also named hydrogen in 1783. -
John Dalton
Was the creator of the modern atomic theory. -
Robert Millikan
Measured the charge of an electron. Is also known for the photoelectric effect. -
Dmitri Mendeleev
Created the first periodic table. -
Cathode Ray Tube
Was created by J.J. Thomson. It is a vacuum containing an electron gun. -
J.J. Thomson
Discovered electrons, isotopes, and the mass spectrometer. -
Law of conservation of mass
Was discovered by Antoine Lavoisier. It led to many other discoveries. -
Daltons Atomic Theory
Was discovered by John Dalton. Explained atoms in different elements could be separated by the mass in their weight. -
Electron Cloud Model
An atom model Where particles are no longer depicted at particles. -
Ernest Rutherford
Proved that radioactivity has transmutation of one chemical to another. -
Gold Foil Experiment
Was done by Hans Geiger. He proved the existence of the atomic nucleus. -
Plum Pudding Model
Was discovered by J.J. Thomson. It is a model of an atom with randomly placed rings. -
Rutherford Model
Was created by Ernest Rutherford. It is a model of an atom. -
Bohr Planetary model
Created by Neils Bohr. It is the atomic properties and molecular structures. -
Henry Mosely
Justified the empirical and chemical concept of the atomic number. -
Quantum Mechanical Model
Created by Werner Heisenburg. It is impossible to record the momentum and the location of the electron. -
Niels Bohr
Created understandings of the atomic structure and quantum mechanics. -
James Chadwick
Discovered the neutron. -
Erwin Schrodinger
Developed a number of fundamental outcomes in the field of the quantum theory.
