1. Day 7 Ionic Bonds
Sci 10 Chemistry

2. Common Ion charges Remember 1+ 3+ 3- 2- 1- 2+
Charges of transition metals will be given in the periodic table as their formation is complicated.

3. Ionic bonds
During the activity with the ion tiles, what did you notice about the CHARGES?
Total charge is always zero
Building a rectangle ensured that the compound would be neutral (zero)
This is why you NEVER write charges in the formula of an ionic compound

4. Nomenclature = naming IUPAC (International Union of Pure and
Applied Chemistry) created rules to be
followed when naming chemical compounds
Name the cation (the metal)
Ex: KBr potassium
Name the anion (the non-metal) using the ending “-ide”
Ex: KBr potassium bromide

5. Other examples – Name these ionic compounds
NaCl
sodium chloride
MgBr2
magnesium bromide
K2O
potassium oxide

6. Other examples – Write the formula
Ex: lithium chloride
Determine the charge of each atom:
Li has a charge of 1+, Cl has a charge of 1-
Draw circles in a table to represent each element until their total equals zero.
Write the symbol of each atom, starting with the metal (positive) ion.
Add subscripts if necessary to show the number of atoms present.

7. Other examples: Write the formula
Ex: magnesium phosphide
Charge of each atom: Mg 2+ P 3-
Draw circles in a table to represent each element until their total equals zero.
Write the symbol of each atom, starting with the metal (positive) ion.
Add subscripts if necessary to show the number of atoms present.

8. To Do:
Go back to the tile activity – Write the names of all of the compounds formed in Part B
Sheet – Day 7 Practice: Ionic Compounds