1. Isn’t it Ionic? Polyatomic Ions

2. Chem Catalyst: Observe the cards of a sodium ion and three polyatomic ions. 1.What do you think a polyatomic ion is? 2.Write three compounds formed between sodium ions and the three polyatomic ions. Use the rule of zero charge.

3. Game: Ionic Grid Find a chemistry friend to come in with you during PAWS or after school to play the game.

4. Polyatomic Ion: An ion composed of a group of atoms with an overall positive or negative charge. Most polyatomic ions are anions. List of Polyatomic Ions

5. Discussion How can you tell if a compound contains a polyatomic ion? How can you determine the formula of an ionic compound containing a polyatomic ion? How can you tell the charge of the phosphate ion on Ca 3 (PO 4 ) 2 ?

6. Check-In What is the name of the compound Be(NO 3 ) 2 ? What ions are present in this compound and what are the charges on the ions?

7. Homework Lesson 22: Isn’t it Ionic Pages 111-113 #1-7