1. Ionic Bonding

2. A Chemical Reaction:
Movement of electrons between combining atoms that results in the formation of a NEW substance.
*The LESS electrons to move, the GREATER the reactivity of the element.

3. Attractive forces hold opposite charges together – IONIC BOND.
Ionic Compounds - a positive ion (METAL) joins with a negative ion (NON-METAL).
Attractive forces hold opposite charges together – IONIC BOND.

4. - + Sodium atom (Na) Chlorine atom (Cl) Sodium ion (Na+)
Chlorine ion (Cl-)
Sodium Chloride
NaCl
(ionic bond)

5. Atoms combine together to form compounds in fixed ratios or definite proportions.
1 Na forms an ionic bond with 1 Cl
10 Na Cl
65 Na Cl
The smallest unit of an ionic compound is called a formula unit.

6. Ionic Compounds
formula unit

7. 1 : 1 AlN N-3 Al+3 As atoms combine in definite proportions: Aluminum
Nitrogen
N-3
Al+3
Aluminum Nitride
1 : 1
AlN

8. 1 : 3 AlF3 3 F- Al+3 As atoms combine in definite proportions:
Aluminum
Fluorine
3 F-
Al+3
1 : 3
Aluminum Fluoride
AlF3

9. Use Bohr diagrams to illustrate the compounds formed from the following reaction:
Ca and F
Na and P
Mg and N