1. Covalent Nomenclature

2. Covalent Nomenclature
Covalent bonding occurs between…
a non-metal & a non-metal
To name an covalent compound:
prefix*–first non-metal
prefix –second non-metal with –ide ending

3. Covalent Nomenclature Prefixes
1 = mono-*
6 = hexa-
2 = di-
7 = hepta-
3 = tri-
8 = octa-
4 = tetra-
9 = nona-
5 = penta-
10 = deca-
*mono- is not used on 1st element in the formula

4. Covalent Nomenclature
For example… CO
carbon monoxide
CO2
carbon dioxide
N2O
dinitrogen monoxide
N2O4
dinitrogen tetroxide

5. Covalent Nomenclature
To write formulas for a covalent compound, the prefixes indicate the number of atoms of each element in the molecule.

6. Covalent Nomenclature
chlorine monoxide
ClO
2. oxygen difluoride
OF2
diphosphorous pentoxide
P2O5
disulfur dichloride
S2Cl2