1. Naming Covalent

2. Naming Covalent Compounds
Name first element.
The subscript becomes the prefix
Mono=1
Di=2
Tri=3
Tetra=4
Penta=5
Hexa=6
Hepta=7
Octa =8
Nano=9
Deca=10
Do Not write mono on the first element
Name second element with –ide ending
The subscript becomes the prefix even if it is mono
When two a’s, o’s or o and a are together, drop the first for pronunciation purposes

3. Writing Formulas For Covalent Compounds
Write the symbol for the first element
The prefix becomes the subscript
Write the symbol for the second element

4. Examples Name S2O3 Name SO Write the formula for silicon dioxide
Write the formula for nitrogen triiodide