Naming Molecular Compounds

1. Write down the symbol of the first non-metal element and the second non-metal.

2. Using the table of prefix below, the subscript is the number from the prefix. For no prefix, it is a subscript of 1.

Example: Disulfur heptachloride
Step 1 S Cl
Step 2 S₂Cl₇

More Examples: Carbon disulfide, Decaoxygen pentanitride (Answer: C₁S₂, O₁₀N₅)

Prefix Table
mono - 1	tetra - 4	hepta - 7	deca - 10
di - 2	penta - 5	octa -8
tri - 3	hexa - 6	nona - 9

B. Chemical Formula to Chemical Name

1. Write down the first non-metal name.

2. Add prefix from table (1st letter needs capital) End of 1st word.

3. Write down the second non-metal name. Add prefix from table (no capitals in 1st letter). Important: If fitrst element has subscript of 1, you Do not add "mono".

4. replace ending with "ide".

Example: F₂O₁
Step 1 Fluorine
Step 2 Difluorine
Step 3 monoxygen
Step 4 Difluorine monoxide

More Example: C₁O₁, N₃P₈ (Answer: Carbon monoxide, Trinitrogen octaphosphide)