SABIC CHEM 101 Chapter 7 - Part 1

SABIC CHEM 101 Chapter 7 - Part 1 - Chemistry101 Chapter7

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Chemistry 101 Chapter 7 Atomic Structure & Periodicity
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Atomic Structure Electrons – found outside the nucleus; nega2vely charged. Protons – found in the nucleus; posi2ve charge equal in magnitude to the electron’s nega2ve charge. Neutrons – found in the nucleus; no charge; virtually same mass as a proton.
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Atomic Structure
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Atomic Structure The nucleus is small compared with the overall size of the atom and is extremely dense, accounting for almost all of the atom’s mass
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Review of Important Experiments Millikan: Oil Drop Experiment , determined the charge (1.6 x 10 -19 C) and mass (9.1 x 10 -31 kg) of an electron Thomson: Cathode Ray Experiments , determines e/m = -1.76 x 10 11 C/kg Rutherford: Gold Foil Experiment , determined that the atom has a dense center of positive charge called the nucleus and electrons travel around the nucleus at a relatively large distance We are going to continue our discussion of the nature of the atom Quantum Mechanics – Developed to explain the behavior of light and atoms
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SABIC CHEM 101 Chapter 7 - Part 1 - Chemistry101 Chapter7

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