1. Simple Chemical Nomenclature
3 classes of simple compounds…naming convention depends on type.
Ionic Compounds – look for the following at the beginning of the formula: metals or polyatomic cations (NH4+, etc)
Molecular Compounds – look for the presence of nonmetals only, but be on alert for polyatomic ions with only nonmetals (NH4+, etc)
Acids – these will contain a hydrogen atom (H) where the cation should be and will exist in aqueous solution. Some organic acids are called “acid” even when pure, but this is just a simple way to name them…they will have a much more complicated IUPAC name as well

2. 1. Ionic Nomenclature CATIONS (+ ions) ANIONS ( ions)
Representative metals (1A-3A)
maintain their names as listed on the periodic table
Transition metals (d and f blocks)
most will have multiple charges and these will be indicated in parentheses by roman numerals
Zn and Cd – exceptions to the rule for d- block, always +2, charge not needed in compound name
Ag – while multiple charges are known, nearly always +1, charge not needed in compound name
Pb and Sn – are representative, but can be either +2 or +4, charge needed in name
Polyatomic Ions – keep their name
Representative elements (6A-8A)
keep the root but add ide as a suffix
Polyatomic ions – keep their name

3. Ionic Examples- whiteboards
Example 1  Give the names of the following compounds: Li2S , LiClO3 , CrCl6 , Pb(OH)2
Example 2 – Write formulas for the following compounds: aluminum oxide, sodium sulfite, nickel(III) iodide, tin(IV) phosphate

4. Ionic Examples- whiteboards
Example 1  Give the names of the following compounds: Li2S , LiClO3 , CrCl6 , Pb(OH)2
Lithium sulfide
Lithium chlorate
Chromium (VI) chloride
Lead (II) hydroxide
Example 2 – Write formulas for the following compounds: aluminum oxide, sodium sulfite, nickel(III) iodide, tin(IV) phosphate

5. 2. Covalent Nomenclature
Simple covalent nomenclature uses prefixes to indicate the number of each atom present.
The least electronegative (more metallic) atom comes first, followed by the more electronegative atom
The prefix “mono” can be omitted on the first element
Odd vowel combinations such as “ao” can often be shortened
1 – mono
2 – di
3 – tri
4 – tetra
5 – penta
6 – hexa
7 – hepta
8 – octa
9 – nona
10 – deca

6. Covalent Examples- whiteboards
Example 1 – give the names of the following compounds: S2Cl2 , N2S5 , NO2 , N2O5
Example 2 – write formulas for the following compounds: trisulfur dioxide, diselinium monochloride, tetraphosphorus pentoxide

7. Covalent Examples- whiteboards
Example 1 – give the names of the following compounds: S2Cl2 , N2S5 , NO2 , N2O5
Disulfur dichloride
Dinitrogen pentasulfide
Nitrogen dioxide
Dinitrogen pentoxide
Example 2 – write formulas for the following compounds: trisulfur dioxide, diselinium monochloride, tetraphosphorus pentoxide

8. Acid Nomenclature

9. Acid Examples- whiteboards
Example 1 – give the names of the following compounds: HBr , H2CrO4 , HCN , HNO2
Example 2 – write formulas for the following compounds: oxalic acid, sulfurous acid, hydrophosphoric acid

10. Acid Examples- whiteboards
Example 1 – give the names of the following compounds: HBr , H2CrO4 , HCN , HNO2
Hydrobromic acid
Chromic acid
Hydrocyanic acid
Nitrous acid
Example 2 – write formulas for the following compounds: oxalic acid, sulfurous acid, hydrophosphoric acid