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Dalton Model
John Dalton is a British chemist and he published his New System of Chemical Philosophy. It explains that different elements have atoms of different mass and that each element is made of small atoms. He looked at atoms as tiny, solid balls. -
Thomson Model
J. J. Thomson was a British scientist and he had proposed a new model and it suggested that an atom is positively-charged sphere that has electrons embeded in it.You could describe his model as looking at a muffin with berries through it. -
Nagaoka Model
Hantaro Nagaoka, a Japanese physist, created a model that had a large sphere in the center with a posotive charge. This model showed electrons revolving around this sphere. Just like a how planets revolve around the sun. -
Rutherford Model
Ernest Rutherford is a British physicist and he concluded that the atom is mostly in empty space. Also that electrons orbit randomly around a small, postively charged nucleus. -
Bohr Model
Niels Bohr, a Danish physicist, had determined that electrons aren't randomly located around the nucleus. He said that atoms give off energy or absorb when the electrons move from shell to shell. His model showed electrons that move in xhells, or specific layers. -
Modern Model
This model shows the electrons as formind a negatively charged cloud around the nucleus. Also it is impossible to determine exactly where an electron is at any time. -
Chadwick model
Chadwick,a British physist, discovered the neutron. THe neutron is a partice having about the same mass as the proton but without electral charge. The neutron explained why atoms were heavier than the total mass of their protons and electrons.
