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Jan 1, 1000
415BC Democritus
proposed the idea that matter wasn't infinitely divisible, believed matter was made up of individual particles called "atomos" -
Jan 1, 1000
353BC Aristotle
Aristotle rejected the atomic "theory" entirely -
Jun 5, 1288
Battle of Worringen
John I of Brabant defeats the duchy of Guelders and wins possession of the duchy of Limburg -
Mar 15, 1311
Battle of Halmyros
The Catalan Company defeats Walter V of Brienne to take control of Duchy of Athens. -
Oct 28, 1492
Columbus
Columbus lands in Cuba and discovers the New World -
Antonie Lavoshire
Antonie Lavoshire discover the phlogiston theory was inncorrect, he recognized and named hydrogen and oxygen -
Joesph Proust
Stated and proved the Law of Definite Proportions -
John Dalton
John Dalton revived and revised Democritus's ideas based on scientific resarch he had performed. -
Amadeo Avogadro
Studied atoms and the laws of gases. -
William Crooks
William Crookes discovered Thallium. -
Henri Becquerel
Discovered radioactivity -
J.J. Thomson
JJ Thomson was the first to suggest tht an atom was made up of smaller particles called electrons. -
Madame Curie
Discovered radioactivity, polonium, radium -
Max Planck
Max Planck discovers the Quantum Theory -
Robert Millikan
Robert Millikan measured the charge on a single electron. -
Ernest Rutherford
Ernest Rutherford discovers a radioactive atom changes to a different atom on emission of radiation. -
Henry Moseley
Henry Moseley discovers the atom of each elemnet contain a unique positive charge. -
Niels Bohr
Niels Bohr studied the structures on a atom -
Albert Einstein
Discover the theory of relativity and the mass energy equivalence to E= mc(squred) -
Louis deBroglie
Louis deBroglie discovered the properties of a electron -
Erwin Schrodinger
Erwin Schrodinger developed the wave equation, called the Schrodinger equation -
Werner Heinsenberg
Werner Heisenberg developes the uncertainty priciple, while working on the mathematical foundations of quantum mechanics -
James Chadwick
John Chadwick discovers the existence neutron
