1. Ionic bonds and ionic compounds Chapter 6.3

2. Objectives Compare and contrast a chemical formula for a molecular compound with one for an ionic compound Discuss the arrangements of ions in crystals Define lattice energy and explain its significance List and compare the distinctive properties of ionic and molecular compounds Write the Lewis structure for a polyatomic ion given the identity of the atoms combined and other appropriate information

4. 3-D network of positive and negative ions mutually attracted to one another.

5. Above – Na+1 and Cl-1 are in a 1 to 1 ratio

7. Formation of Ionic compounds Using electron dot notation to show ionic bonding Na Cl Sodium atom Chlorine atom Na + Cl Na+1 + Cl -1 Sodium atom Chlorine atom Sodium cation Chlorine anion Ca + F + F Ca+2 + F -1 + F -1 Sodium atom Fluorine atom Fluorine atom Calcium cation Fluorine anion Fluorine anion

9. Energy released when one mole of an ionic crystalline compound is formed from gaseous ions.

11. Polyatomic Ions Charged group of covalently bonded atoms +1 -1 H H N H H -2 O N O O O O SO O Ammonium Ion Nitrate Ion Sulfate Ion NH4+1 NO3-1 SO4-2 -3 O O P O O 4 O 6 e- each 24 e- 32 e- Phosphate Ion 1P 5 e- each 5 e- so 29 e- PO4-3 29 e- 3 e- 32 e-