Common Names A lot of chemicals have common names as well as the proper IUPAC name. Chemicals that should always be named by common name and never named by the IUPAC method are: H2O - water, not dihydrogen monoxide NH3 ammonia, not nitrogen trihydride

Bellwork What is the difference between an ionic bond and a covalent bond? Give an example of an ionic bond. 3. Give an example of a covalent bond.

4. Chemists have a system for naming all types of compounds 4. Chemists have a system for naming all types of compounds. Why would this be important? Universal consistency; chemists everywhere will be able to communicate!

5. Some compound have common names that are used, like H2O is ___________. water

6. We will learn the steps for naming both ionic and covalent compounds. We will name only _______________ compounds, meaning they have only two parts. binary

7. These are the steps for naming binary ionic compounds: A. Metal first, then nonmetal Write the metal name. Write the root of the nonmetal and add –ide to the end. 1. NaCl 2. CaBr2 3. Na3P Sodium chloride Calcium bromide Sodium phosphide

8. These are the steps for naming binary covalent compounds: A. The nonmetal farthest on the left of the table is written first. Add prefixes to indicate number of atoms. Never write the prefix “mono-” for the first element. Change the ending to –ide for second element.

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

B. Mononitrogen trioxygen C. MonoNitrogen trioxygen A. Nitrogen + oxygen B. Mononitrogen trioxygen C. MonoNitrogen trioxygen D. Nitrogen trioxide (notice for oxygen, you drop the “y” and change to “i”!)

9. Try these on your own! CCl4 N2O SF6 carbon tetrachloride dinitrogen monoxide sulfur hexafluoride

Work on the following worksheets on your own!