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Atomic Timeline
è stata creata
MILLER GRIMSLEY
⟶ è stato aggiornato 17 set 2018 ⟶
List of edits
Linee del tempo dal
MILLER GRIMSLEY
:
6 dic 2018
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Eventi
John Dalton (1803): Proposes Atom Theory
Michael Faraday (1838): Develops electrolysis (Splitting of molecules with electricity)
Lothar Meyer (1864): Classifies elements into 6 families
James Clerk Maxwell (1873): Proposed electromagnetic fields filled void between atoms
G. J. Stoney (1894): Proposed the existence of Electrons
Ernest Rutherford (1898): Studied radiation from uranium and named them alpha and beta
Ernest Rutherford (1898): Estimated atom size and concluded mass was contained in the Nucleus
Marie Curie (1898): Studies uranium and thorium and coined the term radioactivity
Soddy (1900): Discovered Half-Life
Hantaro Nagaoka (1903): Created the Saturnian model of atom. (flat rings of electrons floating around positive particle)
Hans Geiger (1906): Creates the Geiger–Müller tube
R.A. Millikan (1909): Found the charge and mass of an electron with oil drop expiriment
Ernest Rutherford (1911): Gold Foil Expirement
H.G.J. Mosely (1914): Discovers that the number of protons equals the atomic number
Francis William Aston (1919): Uses atomic spectrograph to identify 212 isotopes
Niels Bohr (1922): Created atomic model that had levels of orbiting rings
Cockcroft / Walton (1929): First to created a nuclear reaction and create alpha particles
James Chadwick (1932): discovers existence of Neutrons, which have a similar mass to protons
Lise Meitner, Hahn, Strassman (1938): Discovered Nuclear Fission
Enrico Fermi (1942): Created first nuclear reactor
Antoine Lavoisier (1778): Wrote first comprehensive list containing 33 elements & classified metals and non-metals
William Ramsay (1884): Discovers the Noble Gases
