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Democritus discovers the atom. All atoms are indivisble, Atom derives from atomos. Atomos is greek for indivisible.
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Born in Eaglesfield, Cumberland County, England.
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John Dalton becomes electred as a member of the Manchester Literary and Philosophical Society and a few weeks later, he communicated his first paper on "extraordinary facts relating to the vision of colors" in which he stated that the shortage in color perception was caused by discoloration of the liquid medium of the eyeball.
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John Dalton becomes a secretary of the Manchester Literary and Philosophical Society,
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John Dalton presents an important series of papers entitled "Expiremental Essays" on the constitution of mixed gases; on the pressure of steam and other vapors at different tempuatures, both in vaccuum and in air; on evaporation; and on the thermal expansion of gases.
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Printed his first published table of relative atomic weight. Dalton provided no idication in this first paper on how he had arrived at these numbers, however, in his labatory notebook there is a list in which he sets out the relative weights of the atoms of a number of elements, derived from analysis of water, ammonia, carbon dioxide, etc. by chemists of the time.
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He proposed atomic theory, with spherical solid masses in motion. Atoms can't be made or destroyed.
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John Dalton gives the first announcement of his famous atomic theory.
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Dalton gives a further account in the first part of the first volume of his New System of Chemical Philosophy.
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Dalton releases the second part of his volume.
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Dalton becomes a corresponding member of the French Academie des Sciences.
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Dlaton is elected as one of the eight foreign associates.
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John Dalton suffers his first minor stoke.
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Dalton suffers his second stoke which left him with a speech impediment, though he remained able to do experiments.
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Dalton suffers yet another stroke, and on July 26 he recorded, with a trembling hand, his last meteorological observation.
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On July 27, in Manchester, Dalton fell from his bed and was found lifeless by his attendant. John Dalton, whose atomic theory remains a cornerstone of the ohysical sciences, had forty thousand mancunians who turned out to pay their respects at his funeral.
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Born in Cheetham Hill.
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Born at Spring Grove, Nelson Province, New Zealand.
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Neils Bohr was born in Copenhagen.
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Erwin Schrodinger is born in Vienna, Austria.
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First original research on the high frequency magnestisation of of iron. Developed a timing device which could switch circuits in less than one hundred thousandth of a second.
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Extended his research to higher frequincies using discharging Leyden jars and a Hertzian oscillator. Developed a magnetic detector of very short current pulses.
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Measured the high frequency dielectric properties of materials. Used his magnetic detector as part of a frequency meter.
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Sets the world record for the distance over which 'wireless' waves were detected.
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At first, Thomson thought that atoms were made up of thousands of electrons because of their mass. If this were true then atoms would have a massive negative charge, but usually atoms have no charge. Thomson then thought that atoms had a number roughly equal to its atomic number. Atoms contain the same number of positive charged paritcles as they do negative. To express this idea, he invented the "Plum Pudding" model.
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He described atoms as ball of postive charge containing a number of electron, discovered the electron.
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Discovers rays from radioactive materials are of two main types, which he names alpha and beta.
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Demonstrates the principle which is the basis of today's modern smoke detector.
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Discovers a radioactive gas, later to be named radon.
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Announces formally that radioactivity is a manifestation of sub-atomic change.
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Elected Fellow of the Royal Society of London.
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In 1904 Thomson thought a model of the atom was a sphere of positive matter in which electrons were positioned by electrostatic forces. He estimated the number of electrons in an atom from measurements of the scattering of light, X, beta and gamma rays initiated by the research. This led to the discovery of the mass spectograph.
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Awarded the Rumford Medal, his first major science prize.
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Joseph John Thomson wins the Nobel Prize for Physics in 1906.
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Ernest Rutherford wins the Nobel Prize in Chemistry.
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Announces the nuclear model of the atom.
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Du to the start of WWI, Schrodinger's scientific progression was put on hold. Since most men were serving in the war, no theoritician was avaliable to sharpen his skills by giving him mutual critisism.
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Becomes knighted, now he is Sir Ernest Rutherford.
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Becomes the world's first successful alchemist, changing nitrogen into oxygen (he splits the atom).
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Neils Bohr founds the Insitiute of Theoretical Physics and later becomes the director of it.
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Neils Bohr wins the Nobel Prize for Physics for his services in the investigation of the structure of atoms and the radiation emenating from them.
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Neils Bohr debates with Albert Einstein over the quantom theory.
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Neils Bohr becomes a Fellow of the Royal Society of London and later on recieves the Royal Society Copley Medal in 1938.
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Erwin Schrodinger becomes chairman of theoretical physiscs in Berlin, where he and Albert Einstein become colleauges after being in communication since 1925.
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Elected President of the Institute of Physics.
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Erwin Schrodinger wins the Nobel Prize in physics because of his discovery of new, productive forms of Atomic Theory. The Atomic Theory is describing the structure, behavior and other oarts if the atom and its component parts.
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Ernest Rutherford passes away at the age of 66 in Cambridge, England.
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On August 30, 1940, Joseph John Thomson passes away at the age of 83.
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He went to the Insititute of Advanced Studies in Dublin where he became the Director for Theoretical Physics. He stayed in Dublin until his retirement.
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Neils Bohr's ideas and work helps the International Atomic Energy Agency.
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Neils Bohr was given the Atoms for Peace Award.
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Erwin Schrodinger passes away in Vienna at the age of 73 of tuberculosis.
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Neils Bohr passes away on November 18, 1962 in Copenhagen from a stroke at the age of 77.
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The Institute of Physics at the University of Copenhagen changed their name to the Neils Bohr Institute in honor of him.