1. LECTURE 5
IONS & IONIC COMPOUNDS

2. Chapter 5
Visual Concepts
Ionic Bonding

3. Binary Formula Compounds that have only 2 different types of elements
Cation
Positively charged atom (usually a metal)
Anion
Negatively charged atom (usually a nonmetal)

4. Cations vs. Anions

5. Binary Ionic Compounds
Contains 2 atoms ionicly bonded together
What is an ionic bond?
Metal + Nonmetal
Rules
Name the cation (metal) as it appears in the P.T.
Name the anion (nonmetal) by changing the ending to –ide

6. Naming Ionic Compounds
Chapter 5
Visual Concepts
Naming Ionic Compounds

7. Sample Problems Name the following formula NaCl CaF2 Li2O
And special cases:
CuCl
CuCl2

8. Sample Problems Name the following formula NaCl – Sodium Chloride
CaF2 – Calcium Fluoride
Li2O – Lithium Oxide
And special cases:
CuCl – Copper (I) Chloride
CuCl2 – Copper (II) Chloride

9. Naming Compounds Using the Stock System
Chapter 5
Visual Concepts
Naming Compounds Using the Stock System

10. How do I write the formula?
Count Valence Electrons
Obey the Octet Rule

11. Writing Binary Formula
Rules:
1. Write the symbol of the cation with its charge
2. Write the symbol of the anion with its charge
3.“Criss-Cross” Applesauce

12. Writing Binary Formula
Example: Calcium Nitride
Calcium = Ca+2
Nitride (Nitrogen) = N-3
Ca+2 N-3
Formula: Ca3N2

13. Comparing Monatomic, Diatomic, Polyatomic Compounds

14. Naming Polyatomic Formula
Ions made up of 2 or more atoms and a total charge of < or > 0
If the formula contains 3 or more atoms, look for a polyatomic ion

15. Naming Polyatomic Ions
Name the cation “as is” found in the P.T.
Name the anion “as is” found on the back of your P.T.
Make no changes
Example: NaOH
Na = Sodium
OH = Hydroxide
Name: Sodium Hydroxide

16. Naming Compounds Containing Polyatomic Ions
Chapter 5
Visual Concepts
Naming Compounds Containing Polyatomic Ions

17. Naming Polyatomic Formula
Example: NaSO4
Na = Sodium
SO4= Sulfate
Name: Sodium Sulfate
Example: KMnO4
K = Potassium
MnO4 = Permanganate
Name: Potassium Permanganate

18. Writing Polyatomic Formula
Write the cation with its charge.
Write the anion with its charge.
“Criss-Cross” applesauce.

19. Writing Polyatomic Formula
Example: Magnesium Nitrate
Magnesium = Mg+2
Nitrate = NO3-
Mg+2 NO3-
Formula: Mg(NO3)2

20. Writing Polyatomic Formula
Example: Aluminum Hydroxide
Aluminum = Al+3
Hydroxide = OH-
Al+3 OH-
Formula: Al(OH)3