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Period: to
Atomic Timeline
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Dalton Model
Dalton believed that atoms were tiny and indestructible particles that had no internal strucutre. He believed atoms to be tiny spheres that make up structures -
Thomson Model
Thomson discover electrons within an atom. He believed the negatively charged electrons were floating in a positively charged sphere. His model has also been called the plum pudding model. -
Rutherford Model
Rutherford discovers that atoms have a small, dense positively charged nucleus in the center. He determines the electrons are moving around this nucleus. -
Bohr Model
Bohr finds that the elctrons orbit the nucleus in circular paths that are fixed distances from the center. -
Electron Cloud Model
Schrodinger develops mathematical equations to describe the motion of electrons in atoms. These equations lead to the Electron Cloud Model -
Quantum Mechanical Model
The current model of the atom is based upon scientists solving Schrodinger's mathematicl equations. This model says that the electrons have energy and a location where they are likely to be.
