1. Notes #2: Binary Naming (Ionic Bonds)
WCHS Chemistry

2. +1 +2 +3 +4 -3 -2 -1

3. ELEMENTS vs. COMPOUNDS Element: What you find on the periodic table
Ex: Cl, H, O
Compound: A combination of elements
Ex: HCl, H2O, NaOH
****Compounds have NEW properties!****

4. IONIC BOND
= a bond formed by the attraction of oppositely charged ions

5. You will choose 1 element from each side (Metal + Nonmetal)+1 +2 +3 +4 -3 -2 -1
You will choose 1 element from each side (Metal + Nonmetal)

6. IONIC BOND
= a bond formed by the attraction of oppositely charged ions
Usually between a metal and a non-metal

7. 3 STEPS TO MAKING AN IONIC BOND
e- are given and taken so that atoms become stable
They become oppositely charged ions e- e-
They are attracted together! e- e- e- e- e- e- Cl 17 e- e-
This attraction is called an IONIC BOND!!! e- e-
Cl-1 Na 11 e- e- e- e- e- e-
Na+1 e- e- e- e- e- e- e- e- e- e- e-

8. REVIEW: WRTIING CHEMICAL SYMBOLS
1st letter is CAPITALIZED (upper case)
2nd letter is LOWER CASE
O Cl Mg Pb Ti Tl

9. WRITING IONIC FORMULAS
Rule 1: Positive ion always goes 1st
Rule 2: Total charge must equal ZERO
Rule 3: If you need more that 1, write the number in a subscript AFTER the symbol. +2 -2 +2 -1 +1 -3
Ca S Mg Cl H N
MgCl2
H3N
CaS

10. NAMING IONIC COMPOUNDS
Rule 1: Positive ion always goes 1st
Write out full name
Rule 2: Negative ion always goes 2nd
Name ALWAYS ends in “-ide”

11. COMMON EXAMPLES
Cl = Chloride
F = Fluoride
Br = Bromide
N = Nitride
I = Iodide
O = Oxide
S = Sulfide
P = Phosphide
C = Carbide

12. -IDE +1 +2 +3 +4 -3 -2 -1