1. Writing and Naming Ionic and Covalent Compounds

2. FIRST, ALWAYS ASK YOURSELF, “IS THIS AN IONIC OR COVALENT BOND?”
IMPORTANT!!!
FIRST, ALWAYS ASK YOURSELF, “IS THIS AN IONIC OR COVALENT BOND?”

3. Writing Ionic Compounds
Rules
Write the symbol of the element (or polyatomic ion) that has the positive charge
Write the symbol of the element (or polyatomic ion) that has the negative charge
The charge (without the + or -) of one ion becomes the subscript of the other ion.

4. Writing Ionic Compounds
Examples:
Sodium Chloride
2. Magnesium Bromide
3. Sodium Sulfide
4. Aluminum Chloride
5. Calcium Carbonate

5. Writing Covalent Compounds
Rules
Use the prefix in the name to tell you the subscript of each element in the formula.
Write the correct symbols for the two elements with the appropriate subscripts.

6. Prefixes 1 = mono 2 = di 3 = tri 4 = tetra 5 = penta 6 = hexa
7 = hepta
8 = octa

7. Writing Covalent Compounds
Examples:
Carbon tetrabromide
2. Diphosphorus trioxide
Iodine dioxide
4. Phosphorus pentachloride

8. Naming Ionic Compounds
Rules
Write the name of the positive ion
Write the root name of the negative ion (first part of element’s name) and add “ide” to the end of it

9. Naming Ionic Compounds
Examples:
NaCl =
2. MgBr2 =
3. Na2S =
4. AlCl3 =
5. CaCo3 =

10. Naming Covalent Compounds
Rules
Name the first element listed in the formula putting the correct prefix in front of the name. If the prefix is “mono” you don’t need to write it!
Name the second element listed in the formula, putting the correct prefix in front of the name but change the ending to “ide.”

11. Naming Covalent Compounds
Examples:
CBr4 =
P2O3 =
IO2 =
PCl5 =