1. Covalent Compounds and Naming
Topic#14 Continued
You can continue on the back side of your notes from yesterday

2. Covalent Compounds 1 Mono- 2 Di- 3 Tri- 4 Tetra- 5 Penta- 6 Hexa- 7
# of atoms
Prefix 1
Mono- 2
Di- 3
Tri- 4
Tetra- 5
Penta- 6
Hexa- 7
Hepta- 8
Octa- 9
Nona- 10
Deca-

3. Naming Covalent Compounds
# of atoms
Prefix 1
Mono- 2
Di- 3
Tri- 4
Tetra- 5
Penta- 6
Hexa- 7
Hepta- 8
Octa- 9
Nona- 10
Deca-
Naming Covalent Compounds
What are covalent compounds?
They consist of 2 non-metals
When given a formula, first determine if it is an
ionic or covalent compound.
When covalent, name just like ionic compounds.
The only difference is that you must add prefixes
to state how many of each atom you have present.
Formula
Name
P2O5
Diphosphorus Pentoxide
N2O3
Dinitrogen trioxide
Si2Br6
Disilicon Hexabromide

4. Hints for naming covalent compounds:
Must end in “-ide”
each element has a “prefix”
prefix refers to # of atoms not valence e-
Name cannot begin with “mono-” therefore it is dropped .
Ex. CO  carbon monoxide, not monocarbon monoxide
The first vowel is often dropped to avoid the combination of “ao” or “oo”.
CO = carbon monoxide(monooxide)
P4O10 = tetraphosphorus decoxide (decaoxide)

5. Writing Covalent Formulas
Covalent will share e- , therefore no charges will result.
WE DO NOT USE CHARGES TO WRITE FORMULAS FOR COVALENT COMPOUNDS!!!!
Simply read the prefix and assign it as a subscript.
Examples:
Dihydrogen monoxide
Tetrasulfur dinitride
Iodine Dioxide
H2O
S4N2
IO2