Chapter 5 Part 1

Chapter 5 Part 1 - Chapter 5 Chemical Bonds Bonds(shared electrons between atoms of different types Types of bonds ionic vs covalent Polarity of

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Chapter 5 Chemical Bonds
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• Bonds (shared electrons) between atoms of different types • Types of bonds – ionic vs. covalent • Polarity of bonds • Properties of molecules • Shapes of molecules – very important when it comes to, for example, interactions between drugs and the biomolecules in your body
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Stable Electron Configurations Fact: Noble gases, such as helium, neon, and argon are inert; they undergo few, if any, chemical reactions. Theory: The inertness of noble gases results from their electron structures; each (except helium) has an octet of electrons in its outermost shell. Deduction: Other elements that can alter their electron structures to become like those of noble gases would become less reactive by doing so.
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Stable Electron Configurations • Sodium can lose a valence electron. In doing so, its core electrons are like the noble gas, neon. •Na + and Ne are “isoelectronic”
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Stable Electron Configurations • Chlorine can gain an electron. In doing so, its electron structure becomes like argon. •Cl - and Ar are isoelectronic
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Lewis (Electron Dot) Symbols G. N. Lewis developed a method of visually representing the valence electrons as dots around the symbol of an atom. * See article # 16 on G. N. Lewis (born in Weymouth, Massachusetts) *
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Sodium Reacts with Chlorine (Facts) • See video clip (again), see also reaction between potassium and bromine
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Sodium Reacts with Chlorine (Theory) • Simple Electron Transfer Reaction
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Sodium Reacts with Chlorine ( Theory ) •N a + ions and Cl - have opposite charges and attract each other. • The resulting attraction is an ionic bond . • Ionic compounds are held together by
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This note was uploaded on 04/23/2009 for the course CHEMISTRY CH105 taught by Professor Armstrong during the Fall '07 term at BC.

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Chapter 5 Part 1 - Chapter 5 Chemical Bonds Bonds(shared electrons between atoms of different types Types of bonds ionic vs covalent Polarity of

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