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Period: to
History of atom
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Antione Lavoisier
Born France 1743 Paris
Made the distinction between elements and compounds -
Charles-Augustin de Coulomb
Born France 14 Jun 1736
Made a law that the force between two electrical charges and inversly proportional to the square of the distance between them. -
John Dalton
Born England 6 Sep 1766
Created the atomic theory which stated that atoms are incredibley small particles that are indestructible -
G.J Stoney
Born Ireland 15 Feb 1826
Found that electricity is negatively charged eletrons -
J.J Thomson
Born England 18 Dec 1856
Found the electron and a model of the atom called the plum pudding model -
Max Planck
Born German 28 Apr 1858
Createdthe quantum theory explaning the behaviour of energy on the atomic level -
Robert Millikan
Born America 22 Mar 1868
Found the electrical charge of an electron -
Ernest Rutherford
Born NZ 30 Aug 1871
That the mass of an atom is concentrated in the centre of the atom in a positively charged ball found during his gold foil experiment -
Neils Bohr
Born Denmark 7 Oct 1885
Electrons circled the atom in large orbits. He also dicovered atoms emit or absorb radiation when jumping between moving and stationary states -
Hans Geiger
Born Germany 30 Sep 1882
Invented the geiger counter, a devise which measures radioactivity -
James Chadwick
Born England 20 Oct 1891
Found the nuetraly charged particles neutrons -
Otto Hahn
Born Germany 8 Mar 1871
Created nuclear fission where a nulcleus slits into two nuclei -
Murry Gell-Mann and George Zweig
Glenn-Mann: Born America 15 Sep 1929
Zweig: Born Russia 30 May 1937
Came up with quarks which are little bits of matter
