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460
Democritus
Democritus had a therory that everything was made up of atoms and this changed the perspective of many people into knowing this but people didnt actually care til thousands of years -
John Dalton
He proposed the atomic therory that all matter was composed of small individual particals called atoms and that there is such of a thing that exixts -
Jj Thomson
he disocvered that there were bodies smaller than the atom in the atom he called them electrons and that changed that they'er things that make up atoms also. -
Period: to
Ernest Rutherford
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Ernest Rutherford
He discovered the nucleus of an atom. This changed the perspective of the atom because when he added the nucleus it changed the whole structure -
Neils Bohr
he made up the Atomic Model and theoryized that electrons orbited the necleus in seperate diirections -
Electron Cloud Model
this is a model where it tells you where the electrons could be around the atom. This changed the perspective because not just surrounding the atom like a force field but more like out of order and no order -
James chadwick
In 1932, while working under Ernest Rutherford at Cambridge, James Chadwick proved the existence of neutrons, the elementary particle that had no electrical charge and was a important building block of the atom's nucleus.
