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Credited with creating the first atomic theory. - 400 BC
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Asserted that a substance is a combination of matter and form. - 350 BC
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"Father of modern chemistry" Found and named hydrogen and oxygen.
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Discovered the Law of Definite Proportions.
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Created the first modern atomic theory.
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Avagadro's theory, “relative molecular mass of a gas can be calculated from the mass of sample of known volume.”
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George Stephenson designs the first steam locomotive.
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Louis Braille invents braille printing for the blind.
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Samuel Morse invents the telegraph and Morse Code.
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Alexander Graham Bell patents the telephone.
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NIkola Tesla develops the alternating current electrical supply system.
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Pioneer of vacuum tubes, one of the first scientists to study plasma.
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Discovered both electrons and isotopes.
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U.S. President William McKinley assassinated.
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Contributed to the discovery of radioactivity.
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Discovered polonium and radium, contributed to the discovery of radioactivity.
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The Great Train Robbery premiers.
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The Wright brothers invent the first gas motored and manned airplane.
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Created the Quantum Theory.
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Measured the charge of electrons.
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Justified the concept of an atomic number.
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Discovered half-lives, created the Rutherford atomic model, split the atom.
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Alcohol prohibition begins in the United States.
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Developed the theory of general relativity. Contributed to the particle theory and motion of molecules.
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Published atomic model closely related to today's,
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Created the theory of electron waves, and wave-particle duality.
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Asserted the uncertainty principle, created quantum mechaincs.
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Created an equation of the change of quantum states, and the Schrodinger's Cat thought experiment.
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Stock market crash, marked the beginning of the great depression.
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Credited with discovering neutrons.
