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John Dalton, a British scientist, discovers the atom. He thinks that the atoms are solid.
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J.J. Thomson, another British scientist, discovered the electron. After that, he creates another model of the atom, but includes the electrons. To him, an atom is a muffin with some kind of berry in it.
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Hantaro Nagaoka, a Japanese physicist, creates a solar-system-like model of the atom, in which the protons circle around a large sphere in the center.
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Ernest Rutherford, a British physicist, thought that the atom was mostly nothing. His model of the atom has the electrons circling the positivly charged nucleus randomly.
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Niels Bohr, a Danish Physicist, said the electrons move around the rings, like an onion's rings.
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The scientists finally decided on the current model, which resembles a cloud. The electrons are negatily charged and form a cloud around the nucleus. The things is, you cannot find where a specific electron actually is.
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Billiard Ball Image: insidepool.com
Blueberry Muffin Image: istockphoto.com
Onion Image: istockphoto.com
Solar System Model Image: 4.bp.blogspot.com
Cloud Image: www.digital-cameras-help.com
