1. Naming Molecular Compounds

2. Naming Molecular / Covalent Compounds First, is the compound molecular?  If the first element is a nonmetal, then the compound is molecular. DO NOT USE CHARGES!!! DO NOT SIMPLIFY!!! Instead, use PREFIXES to show how many of both elements!  Don’t write mono- on first element First element keeps its name Second element ends in –ide

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

4. Name These Molecular Compounds N2ON2O F5S2F5S2 PCl 3 ClO 2 SF 6 Dinitrogen monoxide Pentafluorine disulfide Phosphorus trichloride Chlorine dioxide Sulfur hexafluoride

5. Going the other way… Nitrogen trifluoride Pentaphosphorus trinitride Disulfur dichloride Heptachlorine pentaphosphide Hexanitrogen tetroxide NF 3 P5N3P5N3 S 2 Cl 2 Cl 7 P 5 N6O4N6O4

6. Dihydrogen monoxide  H 2 O  Water Nitrogen trihydride  NH 3  Ammonia Carbon tetrahydride  CH 4  Methane Common Names

7. Naming Acids Acids start with “H”  Two types of acid 1. Binary= 2 elements: H +Cl  HCl (Hydrochloric acid) 2. Oxyacids= contain oxygen H + Polyatomic ion H + SO 4 -2  H 2 SO 4 (Sulfuric acid)

8. Binary Acid 1.Use the prefix Hydro- to name the hydrogen part of acid 2.Add the suffix –ic Examples: HBr = HF= Hydrochloric acid = Hydrosulfic acid = Hydrobromic acid Hydrofluoric acid HCl H2SH2S

9. Oxyacid Contains oxygen H + Polyatomic 1.Use the root of anion a)If it ends in –ate anion, use the –ic ending b)If it ends in –ite anion, use the –ous ending Examples: H 2 SO 4 : Hydrogen + Sulfate= HNO 3 : Hydrogen + Nitrate = Nitrous acid = Phosphoric acid= Nitric acid Sulfuric acid HNO 2 H 3 PO 4

10. Diatomic Molecules Don’t forget about the 7 H 2 HydrogenN 2 Nitrogen O 2 Oxygen F 2 Fluorine Cl 2 ChlorineBr 2 Bromine I 2 Iodine