1. Ionic Compounds
Ch.6 & 7

2. Ionic Bonding – strongest of all bonds
definiton – results from the electrical attraction between cations (+) and anions (-)
“ions” means charges in our case
Calculated by the difference between electronegativity values (over 1.7)
Figure 2 -- p.176

3. Ionic Bonding
Positive ions are formed from the metal elements when they lose electrons
Negative ions are formed from the nonmetal elements when they gain electrons
The two, (+) and (-) come together to form a new compound

4. Ionic Compounds
definition – composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal
In a neutral compound, the net charge will be zero
Balance the charges from cations and anions until the compound is neutral

5. Forming Ionic Compounds
Na+ + Cl-  NaCl
Ca2+ + Cl-  CaCl2
Mg2+ + O2-  MgO
Fe3+ + S2-  ______
beryllium + iodine  ______

6. Naming Ionic Compounds
Name the metal first (complete name)
Name the root of the nonmetal the change the ending to –ide
If there is a polyatomic (more than one atom carrying one charge) use the name as it is
Transition metals have a Roman numeral after it to tell its charge

7. Naming Ionic Compounds
NaCl ____________________
CaCl2 ____________________
MgO ____________________
Fe2S3 ____________________
BeI2 ____________________