Brandon

=BRANDON=


 * 1) __History of the atom__

__[]__
 * **Year** || **Milestone** || **Scientist(s)** ||
 * ~400 BC || The first coherent atomic theory || Democritus ||
 * 1804 || First "modern" atomic theory || J. Dalton ||
 * 1869 || First periodic table || D. Mendeleev ||
 * 1896-9 || Radioactivity discovered and identified || H. Becquerel, M. Curie, E. Rutherford ||
 * 1897 || Electron discovered || J.J. Thomson ||
 * 1909-11 || Identification of an atomic nucleus || E. Rutherford, H. Geiger ||
 * 1913 || Mass of electron determined || R. A. Millikan ||
 * 1913 || Positive charge in the nucleus and naturally occuring isotopes discovered || J.J. Thomson ||
 * 1913 || Atomic number determined, periodic table reorganized || H. Moseley ||
 * 1919 || Proton existance confirmed, neutron proposed || E. Rutherford ||
 * 1931 || Neutron Identified || J. Chadwick ||