January 31, 2020
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Timeline- Alex Aguilar, p.5
⟶ Updated 1 months ago ⟶
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Ben Franklin experimented with electricity and proved that electrons have an electrical charge.
Michael Faraday discovers that atoms have an electrical component
John Dalton proposed The Atomic Theory
William Crookes discovered the element thallium and invented the radiometer, the spinthariscope, and the Crookes tube.
JJ Thompson gets credited with the discovery of the electron (the negatively charged particle of an atom)
Robert Millikan discovered the value for electron charge
Enest Rutherford overturned Thomson's model in 1911 saying that the atom has a tiny and heavy nucleus.
Marie Curie discovered radioactivity
Niels Bohr proposed the theory for the hydrogen atomand how its emitted light in fixed wavelenghts.
Max Plank recieved his award for the Quantum Theory
Democritus states everything is composed of atoms
Antoine Lavoisier found that mass is conserved in a chemical reaction
Joseph Proust published his book called "Law of Difinite Proportions". He stated that a compound is composed of exact proportions of elements
Albert Einstein created the theory of relativity
Louie De Broglie discovered the wave nature in electrons
Herner Heisenberg was awarded the Nobel Prize for Physics
Pauli introduced 2 new numbers & formulated the Pauli principle, stating that no two electrons could have the same sets of quantum numbers
Erwin Schrödinger took Bohr's atom model one step further & got the Quantum medical model of the atom
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