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Atomic Theory Time Line
Created by
Paul
⟶ Updated 6 months ago ⟶
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Events
Cathode Ray Tube Experiment - J. J. Thomson knew that charged particles could be deflected in a magnetic field. Discovering electrons
Democritus- Believed all matter consisted of tiny indivisible particles made of all matter
J. J. Thomson- Discovered electrons
John Dalton- Proposed atoms were identical, atoms of a different element were different size. and all matter is made of atoms
Plum Pudding Model- Made by J. J. Thomson, stated atoms were made of different pieces with positive and negativr charge
Niels Bohr- Discovered atoms transferred energy, electrons orbit around the atom
Bohr Planetary Model- By Niels Bohr showed that electrons and atoms are in orbit with differing energy
James Chadwick- Discovered Neutron
Oil Drop Experiment- Using tiny drops of oil between two metal plates to discover the charge of electrons
Neils Bohr- Discovered electrons in atoms orbit the nucleus
Law of Conservation of Mass- Matter is neither created of destroyed
Rutherford Model
Ernest Rutherford - conducted the gold foil experiment
Periods
Gold Foil Experiment- Ernest Rutherford concluded atoms are mostly dense space with a positive charge nucleus
Antoine Lavoisier- Discovered Hydrogen and Oxygen
Robert Millikan- Discovered charge of an electron using oil drop experiement
Erwin Schrodinger- Found the likelihood of finding an electron using equations
