1. DAILY QUESTION
October 17, 2008
Group 1 ions have what charge? 1+ 2+ 3+

2. Agenda 10/17/08 Daily Question Turn-in Daily Questions “Code Orange”
Chapter 5 Section 3 Notes
Ionic Formulas
Assignments: 1. No assignment

4. Naming Ionic Compounds
Cations (positively charged ions)
Group 1 has 1 + charge
Group 2 has 2 + charge
Anions (negatively charged ions)
Group 17 has 1 – charge
Group 16 has 2 – charge
Group 15 has 3 – charge

5. Determining charge of transition metal cations
An ionic compound must have a total charge of zero.

6. Writing Ionic Formulas
List the symbols for each ion
Write the symbols for the cation first
Write the chemical formula, indicating with subscripts how many of each ion are needed to make a neutral compound

7. Practice Writing Ionic Formulas
Lithium oxide
Beryllium chloride
Titanium (III) nitride
Li2O
BeCl2
TiN