1. (2.2) MOLECULAR COMPOUNDS (p130-131)
Naming and all that.

2. Molecular Compounds
Molecular compounds are formed by combining two non-metals.
They do so by “sharing” electrons.
The bond formed by sharing electrons is called a covalent bond.

3. Properties of Molecular Compounds
Often soft, liquid, solid or gas.
If they dissolve in water, they form solutions that do no conduct electricity.
Tend to have relatively low melting points.

4. Naming Molecular Compounds
Naming molecular compounds is different than naming ionic compounds because non-metals can combine in many different ways.

5. Naming Molecular Compounds
Eg. carbon and oxygen can combine 2 different ways!!!
carbon monoxide CO
carbon dioxide CO2

6. Naming Molecular Compounds
To name a molecular compound prefixes are used to show the number of each type of atom.

7. Prefix system Prefix Number mono 1 di 2 tri 3 tetra 4 penta 5 hexa 6
hepta 7
octa 8
nona 9
deca 10

8. Examples name formula sulfur trioxide dihydrogen monosulfide SiO2 CF4
disulfur dinitride

9. Examples
name
formula
sulfur trioxide
SO3
dihydrogen monosulfide
H2S
silicon dioxide
SiO2
carbon tetrafluoride
CF4
dinitrogen pentoxide
N2O5
disulfur dinitride
S2N2
CONTINUE HERE TOMORROW
NOTE: never have 2 vowels in a row between the prefix and element ex: 2 “o’s” monooxide 

10. Naming Molecular Compounds
A molecular compound has a two-part name:
first
second
Non-metal
Uses prefix for number
Uses prefix for number
Keeps its name
Changes ending to “ide”

11. Common Molecular Compounds
You must know these….
H2O water
H2O2 hydrogen peroxide
CH4 methane
CO2 carbon dioxide

12. Practice -Video to recap! -Do:
Worksheet 2.2 (C) - NAMING MOLECULAR COMPOUND PRACTICE
-Quiz-Molecular Compounds next class
TEST UNIT 1-Part A on THURSDAY!

13. Classwork Workbook 46-48 50-52 Worksheet 2.2 (D)-naming ALL! REMINDER:
TEST UNIT 1-Part A on THURSDAY, FEB 23