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Chapter 7. Quantum Theory and Atomic Structure

• A problem arose in Rutherford’s nuclear model. A nucleus and  electron attract each other; to remain apart the electron must move.

• The energy of the electron’s movement must balance the energy of  attraction.

• Physics established that a charged particle moving in a curved  path such as an electron in an atom must give off energy.

• Why doesn’t the electron continuously lose energy and spiral into  the nucleus?

• Subatomic matter seemed to violate common experience. A new  model was needed to describe atoms.

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