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the solid sphere model is the first atomic model and it was developed by john dalton. he hypothesized that an atom is a solid sphere that could not be divided into smaller particles.
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j.j. thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles (aka electrons). thomson proposed the plum pudding model, which had electrons within a positively-charged "soup."
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developed by ernest rutherford, the nuclear model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.
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in bohr's model, electrons travel in defined circular orbits around the nucleus. electrons can jump from one orbit to another by emitting or absorbing energy.
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schrodinger used mathematical equations to describe the likelihood of finding an electron in a certain position. this atomic model is known as the quantum mechanics model of the atom.
