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Discovered matter was made of small particles called atoms. 400 B.C.
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Rejected Democritus's theory. (384-322) B.C.
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Discovered the combustion theory, conversation of mass.
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Discovered oxygen.
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Lewis and Clark started their expedition across the United States.
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Avogadro's hypothesis, the same temerature and pressure, equal volume and gases contain the same numberof molecules or atoms.
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The construction of the Erie Canal in New York.
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Removal of the Indians to the west for the settlers to move in and grow crops.
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Image on silver-plated copper, coated with silver iodide.
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Shot in the head at Ford's Theatre, by a wel known actor, he died the next morning in the hospital.
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Discovered cathode rays had different properties, used in olf style tv's.
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Discovered some spntaneously decompose and give off very penetrating rays.
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Discovered the element and proposed a model of the structure of the atom.
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Discovered when you vibrate atoms enough you can measure the energy in discreye units, units of the energy packets, quanta's.
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Discovered the quanta behaved like discrete particles.
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Discovered the charge and mass of an electron.
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Theoryl that electrons do not spiral into the nucleus and come up with some rules for what happens.
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Discovered protons, first identified building blicks of the nuclei of all elements.
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The 19th amendment was passed giving women the right to vote.
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Matrix mechanics, fit with the conception of electrons as partial.
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Theory that was like the violin but hte vibrations traveled in a circle, and gave it a symbol.
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Discovered electons can act as waves
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Discovered the neutron.
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Started inventing the World Wide Web.
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Uranium and thorium spontaneous decay process radioactivity.
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Animal coning was made for livestock produces.
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Terrorist attack on the twin towers.
