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The History of the Atom
Created by
Kane Anderson
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Updated
21 Sep 2017
Timelines by
Kane Anderson
:
20 Sep 2017
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182
Microscope
Events
Dalton explained that elements can be formed into comounds (1880)
J. J. Thompson describes the atom using the plum pudding model (1897)
Rutherford discovered the nucleus of the atom (1902)
Bohr Develops a new model of the Atom with energy "shells" (1920)
James Chadwick discovers the neutron (1932)
Marie Sklodowska Curie Studied uranium and thorium and called their spontaneous decay process "radioactivity". She and her husband Pierre also discovered the radioactive elements polonium and radium. (1898)
J.J. Thomson Used a CRT to experimentally determine the charge to mass ratio (e/m) of an electron =1.759 x 10 8 coulombs/gram. (1897)
