Rules for Naming Covalent Compounds 1. Prefixes are used to show many atoms of each element are present in the compound Prefixes used for Naming Binary Covalent Compounds
Rules for Naming Covalent Compounds 2. Second element is written with an –ide ending. ***All binary compounds, both ionic and covalent end in –ide. 3. The vowel at the end of the prefix is dropped when the name of the element begins with the same vowel. Example: monoxide, not monooxide
Rules for Naming Covalent Compounds 4. Mono is omitted if there is just a single atom on the first element in the name. Example: carbon dioxide not monocarbon dioxide
Diatomic Molecules There are 7 nonmetals that exist in nature as diatomic molecules. Di-Atomic (means 2) atoms Formula: Br 2 I 2 How to Remember- N 2 Cl 2 H 2 O 2 “Br. INCl HOF” F 2
Writing Formulas From Names Write the formulas for the following compounds. 1. carbon monoxide 2. nonacarbon tetrachloride 3. hexabromine dioxide 4. phosphorus trichloride 5. octanitrogen pentafloride CO C 9 Cl 4 Br 6 O 2 PCl 3 N 8 Fl 5
Naming Binary Compounds (Covalent) 1. CO 2. SO 2 3. N 2 O 4. CCl 4 5. N 2 O 5 6. N 2 O 4 7. OF 2 Carbon monoxide Sulfur dioxide Dinitrogen monoxide Carbon tetrachloride Dinitrogen pentaoxide Dinitrogen tetraoxide Oxygen difluoride