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Chapter 5-2 Warm - Up

Chapter 5-2 Warm - Up. 1. What is a compound? 2. What is the difference between bond length and bond angle? 3. What are the 3 different types of models that represent molecules? 4. ________ are intermolecular attractions that occur between water molecules.

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Chapter 5-2 Warm - Up

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  1. Chapter 5-2 Warm - Up • 1. What is a compound? • 2. What is the difference between bond length and bond angle? • 3. What are the 3 different types of models that represent molecules? • 4. ________ are intermolecular attractions that occur between water molecules.

  2. Chapter 5-2The Structure of Matter Ionic and Covalent Bonding

  3. Bonding • Bonded atoms usually have a stable electron configuration • Valence electrons interact • Structure similar to noble gases

  4. Bonds • Bonds can be stretched without breaking • Flexible rubber bands

  5. Ionic Bonds • Ionic Bond – formed by attraction between oppositely charged ions • Metal Elements – positive • Nonmetal Elements – negative • Network structure

  6. Ionic Bonds • Formed by the transfer of electrons • Instead of sharing outer most electrons they are transferred • Na+ ion and Cl- ion

  7. Ionic Compounds • Ionic compounds are in the form of networks, not molecules • Na+ and Cl- form to make NaCl • 1:1 Ratio for a zero charge • Ca2+ and F- form to make CaF2 • 1:2 Ratio for a zero charge

  8. Ionic Compounds • When melted or dissolved in water ionic compounds conduct electricity • Electric current – moving charges

  9. Metallic Bonds • Metallic Bond – formed by the attraction between positively charged metal ions and the electrons around them

  10. Metallic Bond • Atoms in metals • Atom’s nucleus and neighboring electrons packed tightly together • Electrons overlap and move freely • Conduct electricity

  11. Covalent Bond • Covalent Bond – formed when atoms share one or more pairs of electrons • Compounds made of molecules • Low boiling point • Water and sugar • Nonmetals

  12. Covalent Bond • Most of the molecules remain intact and do not conduct electricity • No charge

  13. Lewis Dot Structure

  14. A line shows atoms share 2 electrons

  15. Triple Covalent Bond

  16. Polyatomic Ions • Polyatomic Ion – an ion made of 2 or more atoms • Both ionic and covalent bonds

  17. Parentheses Group Polyatomic Ions • Ammonium Sulfate is written as: • (NH4)2SO4 • Act like a single ion • 2 ammonia ions • Carbonate ion: • CO32- • 2- charge

  18. Made of Oxygen • -ite • One less oxygen atom • -ate • One more oxygen atom • The charge of each ion pair is the same.

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