Famous Dead People By CassieGraham 460 Year Democritus discovered the atom http://www.abcte.org/files/previews/chemistry/s1_p1.html 1803 Dalton Reveals the concept of Dalton’s law https://www.biography.com/people/john-dalton-9265201 1879 Year William Crookes invented Crookes Tube http://chemed.chem.purdue.edu/genchem/history/crookes.html 1896 Becquerel discovers radioactivity. http://practicalphysics.org/henri-becquerel-discovers-radioactivity.html 1897 JJ Thomson discovers the Electron [https://www.sciencehistory.org/historical-profile/joseph-john-j-j-thomson] (http://www.timetoast.com 1898 Curies discover Polonium https://www.biography.com/people/marie-curie-9263538 1902 The Curies announced that they had produced a decigram of pure radium https://www.biography.com/people/marie-curie-9263538 1903 Year Antoine Henri Becquerel shared nobel prize with Marie Curie for discoveries. http://practicalphysics.org/henri-becquerel-discovers-radioactivity.html 1909 R.A. Millikan measured the charge of Electrons https://www.britannica.com/biography/Robert-Millikan 1911 Earnest Rutherford discovered atoms have a small charged nucleus surrounded by largely empty space, and are circled by tiny electrons. ttps://www.physicsoftheuniverse.com/scientists_rutherford.html 1913 Niels Bohr created the Bohr Model [https://www.britannica.com/science/Bohr-atomic-model](http://www.timetoast.com 1926 Year Erwin Schrodinger discovered the wave equation https://www.nobelprize.org/prizes/physics/1933/schrodinger/biographical/ 1932 Chadwick discovered the neutron https://www.britannica.com/biography/James-Chadwick