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John Dalton
John Dalton,an english meteorologist and chemist, On October 21,1803 he claimed "An inquiry into the realtive weights of the ultimate particles of bodies is a subject as far as i know, entirely new; I have been prosecuting this inquiry with remarkable success." He showed this by using his method of mixing hydrogen, oxygen, carbon and nitrogen. -
JJ Thomson
Thomson showed that with cathode ray tubes, that all astoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the "pudding model" of the atom. This had negatively charged combined with a a posetively charged "soup". -
Ernest Rutherford
Rutherford conducted the "Gold foil experiment". He preformed his most famous work after recieving a Nobel prize in 1908. In 1909 Rutherford carried out the "Geiger- Marden" experiment along with Hans Geiger and Eamest Marsden. This experiment demonstrated the neuclear nature of atoms by deflecting alpha particles through a thin gold foil. -
Niels Bohr
In 1903, Bohr proposed the theory of the Hydrogen atom based on quantum theory that energy is transfered only in certain well defined qualities -
James Chadwick
Chadwick was assigned the task of finding evidence for rutherfords tightly bond "Protelectrum pair" or neoutron.
