Great Scientists Insert Name Who was it Born
Great Scientists Insert Name
Who was it? • Born in South Dakota, 1901 • Made vital contributions to atomic bomb • Invented cyclotron that accelerated particles to high velocity without high voltage, used to make new elements • Developed e/m ratio of electron • Liked “Lawry’s” seasoned salt
Ernest Lawrence • 1901 -1958 • Invented cyclotron, 1929 – Accelerated particles to bombard with atoms • Made new elements • Made anti-matter to study • Won Nobel prize in physics, 1939
Who was it? • Born in Copenhagen in 1885 • Researched structure of the atom • First to postulate that electrons travel around nucleus of atom • Predicted splitting of uranium atoms • Gave lectures, never “boring”
Niels Bohr • 1885 -1962 • Known for the Bohr model of the atom – Electrons travel around nucleus in restricted orbits • Won Nobel prize in physics in 1922
Who was it? • Born in Württemberg, Germany, 1879 • Postulated light travels in individual photons, 1905 • Wrote special theory of relativity 1905 • Wrote general theory of relativity 1916 • E = mc 2
Albert Einstein • 1879 -1955 • Postulated photons travel in discreet energy packets (individual photons) • Theories of special and general relativity • Nobel prize in physics, 1921
Who was it? • Born 1852 in Paris • Discovered natural radiation in uranium in 1896 • Unit of radiation named after • 1 disintigration/second = 1 Bq • “Oh Henry!”
Henri Becquerel • 1852 -1908 • Known for his discovery of natural radiation in uranium • Shared Nobel Prize with the Curies in 1903
Who was it? • Born in Rome, 1901 • Contributed to early theory of beta decay and neutrino • Demonstrated nuclear transformation with neutrons in elements • Led experiment that performed first controlled nuclear reaction • Very “fair to me”
Enrico Fermi • 1901 -1954 • Discovered neutrino and neutron activation • Work led to fission and controlled nuclear reaction • Nobel prize physics, 1938
Who was it? • Born in Nelson, New Zealand, 1871 • Discovered alpha and beta particles in 1898 • Devised method of counting alpha particles with H Geiger • Investigations of alpha scattering in 1910 led to the discovery of the nucleus • Knighted in 1914
Sir Ernest Rutherford • 1871 -1937 • Discovered alpha and beta particles • Discovered nucleus in 1910 • Won Nobel prize in chemistry, 1908
Who was it? • Born Frankfurt-on-Main, Germany, 1879 • Discovered radiothorium, radioactinum, and mesothorium • Developed methods of separating radioactive particles • Discovered fission by bombarding uranium and thorium with neutrons, 1938 with Strassman • Lets all give him a “hand”
Otto Hahn • 1879 -1968 • Discovered the process of fission by bombarding uranium with neutrons (including the chain reaction) • Won Nobel prize in chemistry in 1944
Who was it? • Born in Warsaw, 1867 • Discovered radium and polonium and developed means to separate it • Refused to patent work for money • Developed unit of radioactivity – 1 Ci = 37, 000, 000 disintigrations/sec • There was no “cure” for her radiation
Marie Curie • 1867 -1934 • Known for her discovering and separating radium and polonium • Shared Nobel prize in physics, 1903 and full prize in chemistry, 1911 – (First to receive two prizes)
Who was it? • Born in 1978 • Isolated protactinium with Otto Hahn in 1917 • Worked with Hahn on behavior of beta rays • Helped discover fission with Hahn and Strassman • “Meitnerium” named after her (elm 109)
Lise Meitner • 1878 -1968 • Spent much of career working with Otto Hahn – Helped discover fission with Hahn and Strassman – Discovered elements with Hahn
Who was it? • Born in Lennep, Germany, 1845 • Worked on thermal conductivity of crystals • Discovered X-rays • Unit of radiation named after him for dose (R) • He had the “will” to do it
William Röentgen • 1845 -1923 • Discovered x-rays in a cathode tube experiment • Won Nobel prize in physics in 1901
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