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Warm Up

Warm Up. Ionization Energy Graph Questions… (10 minutes to answer the questions… 10 minutes to discuss). Bonding POGIL. 30 minutes. My Name is Bond…. Chemical Bond. Chemical Bonding. Chapter 6. Chemical Bond. Why do atoms bond?? To become more stable.

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Warm Up

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  1. Warm Up Ionization Energy Graph Questions… (10 minutes to answer the questions… 10 minutes to discuss).

  2. Bonding POGIL 30 minutes

  3. My Name is Bond… Chemical Bond

  4. Chemical Bonding Chapter 6

  5. Chemical Bond • Why do atoms bond?? • To become more stable. Visual Concepts – to lower potential energy.

  6. Types of Bonding • Ionic • Transfer of electrons from one atom to another • Cations and anions attracting each other by opposite charges (electrostatic bond) • Metal bonds with nonmetal Visual Concepts

  7. Covalent Sharing of electrons between the atoms Nonmetal bonds with nonmetal Visual Concepts

  8. What is the general rule?

  9. Another “Trend” Electronegativity: a measure of the ability of an atom in a chemical bond to attract electrons from another atom in that bond. Draw the Bohr Models for Li, F and Cl Can you identify the trend??

  10. Another “Trend” Electronegativity: a measure of the ability of an atom in a chemical bond to attract electrons from another atom in that bond.

  11. Trend in Electronegativity

  12. Determining bond type using electronegativiy differences… • If the difference is < 1.7 a covalent bond forms. • If the difference is > 1.7 an ionic bond forms. Ex. Cl – Ca Ex. Cl – Br

  13. Let’s look at some ionic compounds… Draw the molecular orbital diagrams for sodium and fluorine. How would the electrons transfer?

  14. Spend about 15 minutes working on the homework… Finish the POGIL Type of Bond WS Bond Type Using Electronegativity Ionic Bonding (on the back)

  15. Warm Up • Draw the molecular orbital diagrams for Magnesium and Fluorine. • How will the electrons move? • How many Fluorine are needed to use all magnesium’s valence electrons?

  16. Lewis Structures… Represents the valence electrons on the atoms with dots… top, side, bottom, side Visual Concepts

  17. Lewis Structures Mg F Al

  18. The Octet Rule… A Really Long Song! In your own words… write the rule!

  19. Show how the electrons would be transferred between. Calcium Sulfur Are the atoms more or less stable? How has the energy changed? This is what you are doing on the HW

  20. Criss-Cross Method We can determine the formula for a neutral ionic compound by looking at the charge of each atom.

  21. Naming Ionic Compounds Name the metal first…. Name the nonmetal….. change the end to “ide” NaCl Sodium Chloride

  22. Determine the neutral formulas and names for the following formula units.

  23. Vocabulary Terms Formula Unit- one molec..(oh! We can’t say that!) 1 unit of an ionic compound. Electrostatic force - the force that occurs when a + charge is attracted to a - charge (causes the bonds!) Salt- another name for ionic compounds

  24. Characteristics of Ionic Compounds • Crystal lattice is made of formula units, which repeat in a geometricpattern • Creates a stable structure Visual Concepts

  25. Characteristics of Ionic Compounds High melting and boiling points. Hard and brittle Many ionize in water- become good conductors.

  26. Warm Up-11/16 • Draw the Lewis Structures for Beryllium and Bromine. • Show how the electrons behave. • Write a neutral formula and name • Calculate the molar mass.

  27. Ionic Bonding with Polyatomic Ions Polyatomic Ions are covalently bonded groups of atoms that have a charge…..

  28. Formula Units with Polyatomic Ions…what is the charge for each? Name the metal… name the polyatomic ion

  29. Ionic Cut and Paste Activity Color fast!! Anything you don’t finish today will need to be finished over the weekend!

  30. Ionic Bonding with Transition Metals…. How would we name the following ionic compounds NiCl NiCl2 Transition metals can have more than one charge… her is where it gets a little tricky!

  31. Ionic Bonding with Transition Metals…. Determine the neutral compound… Fe 3+ and Cl1- The charge of the METAL is indicated using a roman numeral after the name. 1+ (I) 2+ (II) 3+ (III) 4+ (IV) 5+ (V)

  32. Warm Up: Name the following compounds… CrO Cr2O3 FeCl2 FeCl3 NiS CoCl3 Now try going from name to formula!

  33. Exceptions All d block elements get a roman numeral EXCEPT Zn2+, Cd2+, Ag1+ Metals in the p block- No roman numerals EXCEPT Sn and Pb.

  34. Work on the Naming WS Do # 1-10 Do 10 a day till you are done… Then try to go from the name to the formula…

  35. Ionic Equations How is the formula unit going to dissociate in water? Barium chloride Calcium phosphate Cobalt(II)nitrate

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