1. Covalently Bonded Compounds

2. Covalently Bonded Substances
Atoms share electrons by overlapping electron clouds to obtain the octet electron configuration
Example: H2O
CO2

3. Covalently Bonded Substances
Usually formed between nonmetals
Polyatomic ions are held together by covalent bonds
Example O-H–1, NH4+1

4. How to write binary covalent formulas!!
THERE ARE NO CHARGES TO WRITE OR CRISS CROSS
The Subscripts of formula of each element are indicated in the name by Greek prefixes

5. 1 = mono 2 = di 3 = tri 4 = tetra 5 = penta 6 = hexa
Prefixes
1 = mono 2 = di
3 = tri 4 = tetra
5 = penta 6 = hexa
7 = hepta 8 = octa
9 = nano 10 = deca

6. P O P2O5 2 5 The Two Step Process Write the parts
DIPHOSHORUS PENTOXIDE
Write the parts
Use Prefixes as subscripts
DO NOT REDUCE OR USE PARENTHESIS P O 2 5
P2O5

7. First Part gets normal
name with prefix,
except for mono
Second Part gets prefix
and –ide ending!!!

8. Trinitrogen Pentaphosphide
EXAMPLES
CO2
Carbon Dioxide
N3P5
Trinitrogen Pentaphosphide

9. Trinitrogen heptafluoride3 7
Trinitrogen heptafluoride

10. SUFFIX FLOWCHART

11. SAMPLES TO FORMULATE HYDROCHLORIC ACID HYPOCHLOROUS ACID CHLOROUS ACID
PERCHLORIC ACID
DISULFUR TETROXIDE
TIN IV OXIDE
TIN IV SULFATE