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Period: to
Models of Atoms
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Dalton's Atom Model
Dalton believed an atom were tiny, solid balls. He inferenced that the atom's that make up an element are all identical. John Dalton imagined that different elements have atoms with different masses. -
Thomson's Atom Model
J.J. Thomson, a British scientist, discovered the positively electric charge in an atom called the electron. He believed an atom had electrons mixed in them and they were charged spheres. An example of his model is a muffin with berries scattered around in it. -
Nagaoka's Atom Model
Hantora Nagaoka model was a sphere with another smaller sphere in the center of the atom that provided the positive charge to the atom. His model displayed something similar to a solar system, where the sphere in the center is the sun and the electrons revolove around it like the planets. -
Rutherford's Atom Model
Ernest Rutherford inferred that the atom is quite empty, except the electrons orbiting the positively charged nucleus. -
Bohr's Atom Model
Niels Bohr came up with a model where electrons move from layer to layer, rather than randomly. He believes the atom takes or loses energy when one electron moves to another shell. -
Modern Atom Model
Research from the 1920's helped todays model of the atom. Electrons are like a cloud around the nucleus with negative charges. Locating where an electron at a certain time is impossible.
