first, dalton described atoms as solid spheres but thomson suggested that atoms were more like plum puddings as his measurements showed it must contain electrons
rutherfords experiments proved that there are emptyspaces between the positively charged particles (nuclei) and negatively charged particles (electrons)
rutherfords experiment was firing alpha particles at gold foil expecting them to passstraightthrough but some deflected
rutherfords model was a nuclear model that suggested that the atom was made up of a tiny positively charged nucleus surrounded by a cloud of negatively charged electrons with a lot of empty space
bohr suggested that electrons orbit the nucleus in shells so the atom doesnt collpase
further experiments allowed rutherford to dsicover the proton