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John Dalton-Billiard ball model
John Dalton researched properties of compounds.
found given compounds are always compromised, of the same elements in the same whole number.
his model was called the Billiard Ball model. his documents date back to 1803, but wasnt published till 1808 -
JJ Thompson-Plum Pudding model
JJ Thompsons model was called the "Plum pudding model of an atom."
this model proposed that atoms had negatively-charged electrons embedded within a positively-charged "soup." -
Ernest Rutherford-
Ernest rutherford found most of an atom is empty space surrounding a small nuclus. his experiment was the Gold Foil experiment. his model was invisioned as small and compact. -
Niels Bohr-Planetary atomic model
Niels Bohr experiment was on gas atoms. and how if the electron gains energy, it will jump farther from the nucleus. and if it looses energy itll move closer. this theroy and experiment brought him to the planatary model in 1913 -
James Chadwick-Contribution to atoms and isatopes
James chadwicks main contribution to atom and isatopes in 1932 was the discovery of neutrons. and their bonds with the protons to make up the nucleus of an atom. discovering the neutron had almost the same mass as a proton.