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UVM
CHEM 023 -
Chapter 9Review Guide
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Chapter 9 (Electrons in Atoms and the Periodic Table): The Quantum Concept: Discrete energy levels within “shells” around a nucleus. Quantum Mechanical Model of the Atom: o Electron placement governed by a discrete set of Identifiers:Subshell Notation & Orbital Diagrams: Octet concept Concept of Noble Gas CoreConcept of Valence electrons vs. Core electrons Lewis Structure depiction of valance e- structure of Elements: Concept of an element losing or gaining electrons in a chemical reaction to attain a more stable configuration.Trends in the periodic table: • Atomic size • Metallic character • Ionization
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