1. Ionic Bonds Students will be able to Describe ions and explain how they form Understand chemical formulas and ionic compounds Identify the properties of ionic compounds

2. Ions and Ionic Bonds 23

3. Ions 23

4. Ions and Ionic Bonds 23

5. Ions and Ionic Bonds 23

6. Sodium Chloride 24

7. Chemical Formulas and Names 25

8. Chemical Formulas and Names To form the compound Lithium Chloride Charge of Lithium Charge of Chloride Balance charges LiCl Sodium Sulfide Charge of Sodium Charge of Sulfide Balance charges Na2S Aluminum Oxide Aluminum = +3 Oxide = -2 Balance charges Al2O3 +1 -1 +1 -2 25

9. a. Hard, brittle crystals (Special 3D structure) 26

10. Properties of Ionic Compounds b. High melting point c. High boiling point (hard to separate crystals) 26

11. Properties of Ionic Compounds d. Electrical conduction Ions separate in water and can carry charge 27

12. Understanding Main Ideas How does an atom become a positive ion? How does an atom become a negative ion? How do ions form neutral compounds? What are characteristics of ionic compounds?

13. Understanding Main Ideas How many potassium ions balance sulfide ion? Write the formulas for calcium chloride CaCl2 Write the formula for potassium phosphate K3PO4 Name the compound MgS Name the compound NH4Cl Name the compound K2O Which ions are polyatomic?