1. Chemistry Chap 5
Naming Compounds

2. Naming Compounds - Ionic
Binary Compounds – compounds containing only 2 elements
To name:
Write name of elem w/ (+) charge
Add name of (-) elem (ion)
Must end in i-d-e
Example: AlN aluminum nitride

3. Naming Compounds - Ionic
If elem has more than 1 oxidation #, must write the oxid # of the (+) ion after the name of the element
Use Roman numerals in ( )

4. Naming Compounds - Ionic
Not all comps ending in i-d-e are binary
NaOH - sodium hydroxide
When naming comps w/ an elem & a polyatomic ion or 2 polyatomic ions, name (+) ion first then (-) ion.
Do not change the ending of the polyatomic ion.

5. Naming Compounds - Molecular
Some comps are named by an older syst which used prefixes instead of oxid #’s
Usually used if both elems are nonmetals
Binary Molecular Compounds
Rules
If only 1 atom of 1st elem is needed , no prefix used
If more than 1 atom is needed, use a prefix
Always use a prefix for 2nd elem
End in I-d-e

6. Examples of binary molecular compounds
CO – carbon monoxide
CO2 – carbon dioxide
CS2 – carbon disulfide
N2O5 - dinitrogen pentoxide