2/19/10
Post date: Feb 19, 2010 9:43:8 PM
Bell Ringer: Write the chemical formulas for water, carbon dioxide, and salt.
Naming compounds
All compounds have names written out using words AND can be called using their formulas
There are set rules for going between these two ways of identifying compounds
How to name a compound when you have the formula (using example of CO2)
Decide whether the compound is ionic or covalent
ionic - one element is from the left side of the periodic table
covalent - all elements are from the right side of the table
C and O are both on the right side of the table, so this is a covalent compound
Write the names of the elements in the same order as they appear in the formula
Carbon Oxygen
Change the ending of the right-most element to "-ide"
Carbon Oxide
If the compound is ionic, you're done (for now)!
Not ionic, so not finished!
If the compound is covalent, use prefixes (see below) before names of elements to tell how many atoms of each are in one unit of the compound
One exception: Never use mono with the first element. If there is only one atom of the first element, don't write and prefix with it
Carbon dioxide
Number prefixes:
Naming Homework
Complete the following table with either the name or the formula of the compound
Continue "An Inconvenient Truth"