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proposed the idea that matter wasn't infinitely divisible, believed matter was made up of individual particles called "atomos"
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Aristotle rejected the atomic "theory" entirely
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John I of Brabant defeats the duchy of Guelders and wins possession of the duchy of Limburg
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The Catalan Company defeats Walter V of Brienne to take control of Duchy of Athens.
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Columbus lands in Cuba and discovers the New World
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Antonie Lavoshire discover the phlogiston theory was inncorrect, he recognized and named hydrogen and oxygen
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Stated and proved the Law of Definite Proportions
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John Dalton revived and revised Democritus's ideas based on scientific resarch he had performed.
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Studied atoms and the laws of gases.
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William Crookes discovered Thallium.
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Discovered radioactivity
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JJ Thomson was the first to suggest tht an atom was made up of smaller particles called electrons.
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Discovered radioactivity, polonium, radium
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Max Planck discovers the Quantum Theory
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Robert Millikan measured the charge on a single electron.
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Ernest Rutherford discovers a radioactive atom changes to a different atom on emission of radiation.
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Henry Moseley discovers the atom of each elemnet contain a unique positive charge.
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Niels Bohr studied the structures on a atom
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Discover the theory of relativity and the mass energy equivalence to E= mc(squred)
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Louis deBroglie discovered the properties of a electron
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Erwin Schrodinger developed the wave equation, called the Schrodinger equation
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Werner Heisenberg developes the uncertainty priciple, while working on the mathematical foundations of quantum mechanics
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John Chadwick discovers the existence neutron
