1. Ionic Bonding

2. There is a general rule that states that atoms will arrange themselves in an order that will allow them to have eight electrons in their outer shell - or eight valence electrons. This is called the octet rule

3. Ionic bonds are formed by one atom transferring electrons to another atom to form ions.
They are formed between a metal and a non metal
metals form positive ions by losing electrons
nonmetals form negative ions by gaining electrons
the ionic bond is the attraction between the ions of unlike charge

4. Using Lewis Diagrams
Once you have drawn out the Lewis diagram for elements it is easy to see how they connect to make the octet rule

5. Ionic formula
Another way to figure out what the ionic formula is to know that the net ionic charge must equal zero
In other words when you add the charges together they must balance out and equal zero
This holds true for binary compounds and polyatomic ions

6. Naming Binary Ionic Compounds
Binary compounds are when a bond is formed between 2 elements.
there are two simple rules:
1. Always start the name with the metal first and then the non-metal.
2. The non-metal suffix changes to 'ide'.

7. Example:
Compound Chemical Name
1.KCl potassium chloride
2. Na3P sodium phosphide

8. Polyatomic Ions
To name polyatomic ionic compounds, use the same rules but use the polyatomic sheet to name the molecule.
Example:
Compound Chemical Name
CaCO3 calcium carbonate
NH4NO3 ammonium nitrate