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500 BCE
Plato
Funder of the Academy, a program that many consider to be the first university -
405 BCE
Democritus
Developed the concept of atoms. Thought everything was made up of atoms -
400 BCE
The Alchemists
Tried to transform base materials such as lead and copper into silver and gold -
300 BCE
Solar System Model
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33 BCE
Aristotle
Made contributions to all fields of philosophy , invented the field of formal logic -
Robert Boyle
carried experiments investigating the properties of air and vacuum using glass tubes -
Laviosier
discovered the role oxygen plays in combustion, recognized oxygen in 1778 and combustion in 1783 -
Solid Sphere of Billiard Ball Model
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John Dalton
When oxygen is combined with either one or two volumes of nitric oxide in closed vessels over water -
Robert Millikan
He was a physicist who discovered the elementary charge of an electron using the oil drop experiment -
Dmitri Mandeleev
Best known for his discovery of the periodic law -
The Curies
Discovery of radium and polonium and huge contributions to cancer treatments. -
J.J. Thomson
Announces the discovery of Atoms -
Planck's Quantum Theory of Light
The energy of light is proportional to the frequency -
Plum Pudding Model
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Photoelectric Effect
was made by Albert Einstein and is emission of electrons. -
Ernest Rutherford
Postulated the nuclear structure of atoms, discovered alpha and beta rays -
Neils Bohr
Proposed a theory for the hydrogen atom, based on quantum theory that some physical quantities only take discrete values -
Albert Einstein
made the general theory of relativity -
Schrodinger Equitation
He gives the evolution over time of a wave function -
Electron Cloud Model
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Werner Heisenberg
Developed a key piece of quantum theory, the uncertainty principle with profound implications -
James Chadwick
He discovery was the neutrons