-
200
Aristotle 382 bc
he proped that thing will always be able to be cut into smaller pieces -
201
Democritus 403 bc.
he came up with a particale that was so small it could not be cut in two he called it the atom. -
John Dalton
john dalton created the atomic theory from observations gatheredd over time.
the theory stated
everything is made of atoms. atoms can not be divided or created
atoms of the same element are exactly alike
atoms join with other atoms to make newsubstances -
Thomson
he showed that daltons theory was wrong and that there were electrons. -
Rutherford
he relized that atoms were made up of highly dense matter -
Rutherford 1911
he revised the thoery and and made a new model of the atom with a positivly charged nucles -
Bohr
bohr propesed that electrons move around the nucleus in certen pathes -
Schrodinger and Heisenberg
they have revised the model of the atom and said that electrons do not travel in a spasific path and it can not be predicted
