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Chapter 19

Chapter 19. Chemical Bonds. Section 1: Stability in Bonding. Combined Elements 1. When matter combines chemically, it’s properties change. Section 1: Stability in Bonding. Copper. Copper Sulfate. Section 1: Stability in Bonding. B. Formulas 1. Symbols represent a single element

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Chapter 19

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  1. Chapter 19 Chemical Bonds

  2. Section 1: Stability in Bonding • Combined Elements 1. When matter combines chemically, it’s properties change. Section 1: Stability in Bonding

  3. Copper • Copper Sulfate Section 1: Stability in Bonding

  4. B. Formulas 1. Symbols represent a single element 2. Formulas represent the combination of elements called compounds --Each compound has a “fixed ratio” --Subscript behind each symbol is the amount of that type of atom --Numbers in front are how many molecules of that compound * Section 1: Stability in Bonding

  5. Practice

  6. Practice

  7. C. Atomic Stability 1. Hydrogen and Helium fill the 1st energy level of 2 electrons. 2. All other elements want 8 outer “valence” electrons. 3. Noble Gases – stable; have all 8 valence electrons --Can predict valance electrons of Groups 1, 2, & 13-18 with Lewis Dot Structure. * Section 1: Stability in Bonding

  8. Electron Dot PracticeHe N ClLi Ar Al

  9. D. Stability Reached 1. When electrons are gained, lost, or shared between atoms, a chemical bond forms. 2. Chemical bond is an attraction (force) that holds atoms in a compound together. * Section 1: Stability in Bonding

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