1. What type of bonds do the compounds below possess?
Type: Science Scoop
What type of bonds do the compounds below possess?
Compound A
Crystalline solid
Melting point 800ºC
When melted or placed in water it conducts electricity
Dissolves in water
(a polar liquid)
Compound B
Gas at room temperature
Melting point 23ºC
Does not conduct electricity in any state
Does not dissolve in water (a polar liquid)

2. Naming Covalent Compounds

3. Writing Covalent Compounds
Made of two nonmetals
Identify the less electronegative element 1st
(one farthest left & farthest down on Periodic Table)
The 1st nonmetal is just given the name as found on the Periodic Table (just like ionic)
The 2nd nonmetal ending is changed to –ide (just like ionic…don’t change polyatomics)
Differences = numerical prefixes are used to express how many of each nonmetal are present
And no criss-crossing!

4. Covalent Bonding Using Lewis Dots
In covalent bonding, pairs of electrons are shared
F + F
H + Cl
C + O

5. Writing Covalent Compounds (cont.)
You never use “criss-cross” method
The only time you do not use a prefix is when there is only one of the first nonmetal.
Number
Prefix 1
Mono 2 Di 3
Tri 4
Tetra 5
Penta 6
Hexa 7
Hepta 8
Octa 9
Nona 10
Deca

6. Covalent Compound Practice
SO2
N2O
NO2
CCl4
Cl2O7
PCl3
SF6
Si3N4
N(BrO3)5
H2O
Sulfur Dioxide
Dinitrogen Monoxide
Nitrogen Dioxide
Carbon Tetrachloride
Dichlorine Heptaoxide
Phosphorus Trichloride
Sulfur Hexaflouride
Trisilicon Tetranitride
Nitrogen Pentabromate
Dihydrogen Monoxide

7. Covalent Compound Practice
Phosphorus Trioxide
Dinitrogen Pentacarbide
Tellurium Noniodide
Carbon Monoxide
Selenium Heptafluoride
Tetraphosphorous Decoxide
Arsenic Hexabromide
Silicon Dichloride
PO3
N2C5
TeI9 CO
SeF7
P4O10
AsBr6
SiCl2