-
460
Democritus
he believed that atoms were the smallest form of matter. this piece was indevisible and formed everything in the world.to him an atom was a small round ball. this was alos the first model ever thought of. his main contributions were through philisophy, rather than science -
Antoine Lavoisier
he created the law of conversation hich states that matter cannot be created or destroyed. -
John Dalton
he said that atoms are both indestrictuable and indivisible. he also said that all atoms of a certian elements are identical. -
J.J. Thompson
he thought that the atomic model was similar to a piece of rasian bread. he believed the atoms to be a spherical shape with electrons confined inside -
Max Planck
he gave way to the quantam mechanics theory. -
Robert Millik
he preformed the oil drop expariment which helped determine the ss and charge of an electron -
Ernest Rutherford
he believed that there was a solid nucleus that was surrounded by electrons and the rest of the atom was empty space -
Niels Bohr
he applied quantum theory to rutherfords atomic structure. he came up with the electron ring -
Henry Mosely
he came up with the first peridoic table model. -
Aristotle
he is most known for his acchievements in philisophy. he believed that the smallest particles could always be cut in half again and again and that the matter will contine ro shrink in size
