Democritus -
atomos
J. Thomson –
Plum-pudding model,raisin bread model
Antoine
Lavoisier – law of conservation of mass , Founder of modern chemistry
Joseph Prous
– Law of Definite and multiple proportions
Henri
Becquerel – discovered radioactivity
Neils Bohr –
Planetary Model
Henry
Moseley – atomic number, “New Periodic Law
James Chadwick – discovered neutrons
James Chadwick – discovered neutrons
Ernest
Rutherford – alpha-scattering experiment, goil foil
John Dalton
– atoms are indivisible
Robert
Millikan – 1st accurate date on electric charge of an atom = 1.6 x
10^-19 C
Eugene Goldstein- discovered proton
Eugene Goldstein- discovered proton
Dmitri
Mendeleev – periodic table (Russian)
Lothar Meyer
– periodic table (German )
John
Dobereiner – Triads
John
Newlands – Law of Octaves
Erwin
Schrodinger – Elliptical nature of atoms
Max Planck –
quantum theory, atomits emit energy in discrete quantities – quanta
Werner
Heisenberg - Uncertainty Principle
Johannes Van
der Waals – weak forces of attraction
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