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        Exploring Atomic and Electron Structure | Chemistry: Unit 3

        Explore the progression of the model of the atom from the discovery of the first subatomic particle to the development of quantum mechanics with this downloadable PDF. Use this guide to show students the major experiments that changed our understanding of the chemical world over the past few centuries. The major model of the atom was transformed from a simple billiard ball to a complex nuclear model with electrons existing as both particles and waves. Students will gain an understanding of how scientists modify existing theories based on newly available evidence.

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