1. IONIC BONDS What are Ionic and Covalent Bonds?
Naming Simple Ionic Compounds
Writing Simple Ionic formulas

2. Bonds: Chemical Bond – a force that holds two atoms together
Caused by:
Attraction between ions
Attraction of a positively charged nucleus and the negatively charged electrons of a different atom.

3. Bonds: Ionic and Covalent
Ionic Compounds
A bond between two elements where electrons are transferred from one element to another
Covalent Compounds
A bond between two elements where electrons are shared between the elements
Bonds form between the valence electrons of each atom!

4. Ionic Bonds:
Ionic bonds are formed between ions, and include both a metal and a nonmetal.
Ion: a charged particle
Cation: loses one or more electrons to become positively charged (metals)
Anion: gains one or more electrons to become negatively charged (nonmetals)

5. Ionic Bonds/Compounds:
Simple Ionic Compounds are also known as Binary Compounds
There are ONLY 2 elements present
Always a metal and a nonmetal
The elements always come from the s and p blocks on the periodic table.

6. Naming Simple Ionic Compounds:
The name of the metal ALWAYS comes first
The metal’s name is the same as it is on the periodic table
The name of the nonmetal ALWAYS comes last
The nonmetal’s name changes.
The ending of the nonmetal will change to “ide”
Na2O
Name the metal directly (rule 1): Sodium
Change the ending of the nonmetal (rule 2): oxide
Sodium Oxide

7. Naming Simple Ionic Compounds:
Simple Ionic Compound Formula
Ionic Compound Name KF
Al2O3
CaBr2
Li3P
Li2S

8. Oxidation Numbers/States: What are the charges of each family?+1 +2 +3
+/- 4 -3 -2 -1

9. Ionic Bonds: Writing Compounds
Compounds MUST be neutral
Charges MUST cancel each other
Add up the charges until you get 0
The metal (cation) ALWAYS comes first
The nonmetal (anion) ALWAYS comes second

10. Example: Sodium (Na+1) and Oxygen (O -2)
Oxygen’s -2 charge needs to be cancelled out by sodium’s +1 charge.
We will need 2 sodium ions to cancel the 1 oxygen ion.
= 0 (this would be neutral)
So our compounds formula is: Na2O (2 sodium ions and 1 oxygen ion)

11. Drop and Swap:
The method that is used to write the proper formulas for different ionic compounds is the drop and swap.
Bring down and over the numerical value (WITHOUT the charge sign)
Na2O
DO NOT WRITE THE 1’S

12. Calcium (+2) and Oxygen (-2)
Drop and Swap:
Subscripts MUST be at the simplest whole number ratio
Calcium (+2) and Oxygen (-2)
Ca+2 O-2
Ca2O CaO

13. Drop and Swap Practice:
Metal
Nonmetal
Drop and Swap Form
Simplest Whole Number Ratio Form
Calcium
Fluorine
Barium
Sulfur
Lithium
Phosphorous
Magnesium
Oxygen
Boron
Cesium