1. Objective: To Introduce ionic bonds and ionic compounds Do Now: Write the electron dot configuration for the following elements: -Sodium -Chlorine -Barium -Krypton

2.  Ionic compound- compound composed of cations and anions  Although they are composed of ions, the ionic compounds are electrically neutral Formation of Ionic Compounds

3.  Table salt is an ionic compound of sodium cation (Na + ) and a chloride anion (Cl - )  Epsom salt is an ionic compound of magnesium cation (Mg 2+ ) and chloride ions (Cl - )  Ice melt is an ionic compound of calcium cation (Ca 2+ ) and chloride ions (Cl - ) Examples

4.  1. Most ionic compounds are crystalline solids at room temperature  2. Ionic compounds generally have high melting points  3. Ionic compounds can conduct electric currents when melted or dissolved in water Three Properties of Ionic Bonds

5.  Ionic bonds are the electrostatic forces that holds ions together in ionic compounds  Na + :Cl:Na + + : Cl : - Ionic Bonds....

6. Shortcut to predict ionic bonds  To predict ionic bonds, you can use the “criss cross” method to determine the ionic bonds  Na.:Cl:  Sodium will end up with a +1 charge and chlorine will have a -1 charge...

7.  Na +1 Cl -1  Sr 2+ Br -1

8.  Lithium and Fluorine  Calcium and oxygen  Aluminum and Bromine Try these Out

9. Naming Ionic Compounds  From last lesson (7.1) you know how to name metals and nonmetals when they are ions  Metals: keep their element name  Nonmetals: end in -ide

10. Naming Ionic Bonds  NaCl  The first element listed in the chemical formula is the one you start with  It should not have a change in the name  Sodium

11. Naming Ionic Bonds  The second element listed should be the nonmetal with an –ide at the end  Chloride  Sodium Chloride (NaCl)

12. Try these  MgO  Al 2 O 3  GaCl 3

13. Transition Metals  The transition metals MUST have the roman numeral listed with it’s chemical name because of their multiple valences  Iron (II) oxide (FeO)  Iron (III) nitride (FeN)

14. Transition Metals  Cu 2 O  You know the valence of oxygen and the charge it will have  Use that information, and the subscripts to find out the roman numeral for copper

15. Transition Metals  Cu 2 O  Oxygen has 6 valence electrons and will be a 2- charge to reach octet  If you need 2 coppers for 1 oxygen, what is the valence electron for this copper?

16. Transition Metals  Copper has one valence electrons  Copper (I) oxide

17. Try These Out Titanium (IV) and Chlorine Cobalt (II) and Oxygen Iron (III) and Nitrogen

18. Here’s more examples (chemical formula and name)  Iron (II) and chlorine  Mercury (I) and Nitrogen