Rules for Naming Binary Compounds and Writing Formulas

1. Rules for Naming Binary Compounds and Writing Formulas • Determine if the compound is ionic or covalent. • If the compound is composed of non-metals it will be covalent. • Click here for a periodic tablein which the non-metals are green, the pink elements are metals, and the blue elements are metalloids. (If necessary review the lesson on the periodic table) • If the compound has a metal it is ionic and that lesson will be on the next program.

2. Rules for Naming Binary Compounds and Writing Formulas • Constructing a covalent compound’s name • Name a covalent compound using prefixes, the only exception is not using “mono” with the first element. • The end of the last element’s name is changed to “ide”(such as oxide in carbon monoxide) • CO would be carbon monoxide (correct) vs. monocarbon monoxide (incorrect). • CO2 would be carbon dioxide. • N2O5 would be dinitrogen pentoxide.

3. Rules for Naming Binary Compounds and Writing Formulas • Constructing a covalent compound’s name • Practice • NO • SF6 • SO3 • CCl4 • Check your self

4. Rules for Naming Binary Compounds and Writing Formulas • Constructing a covalent compound’s formula • Write the symbol for the first element in the name. • Put the number associated with the prefix as a subscript after the element. • Do the same steps for the second element. • A name such as tetraphosphorous decaoxide would have a formula of P4O10.

5. Rules for Naming Binary Compounds and Writing Formulas • Constructing a covalent compound’s formula • Practice • Carbon dioxide • Phosphorous trichloride • Diiodine septaoxide • Disulfur monoxide • Check your self

6. Rules for Naming Binary Compounds and Writing Formulas • Constructing a covalent compound’s formula • Practice • Carbon dioxide CO2 • Phosphorous trichloride PCl3 • Diiodine septaoxide I2O7 • Disulfur monoxide S2O • Check your self

7. Rules for Naming Binary Compounds and Writing Formulas Test for unit Complete the assignment on this link and return it to the instructor (the due date will be specified by your instructor). Assessment Find the label from a food or toiletry item and indicate the names or formula’s for the covalent compounds found on it. Send the label and the list to your instructor when you return your exam. Click here to Exit this lesson