In this lesson students will review and test their understanding of simple ionic compounds.
Before the Activity
Start lesson by reviewing notes:
these are compounds composed of metals and nonmetals
ionic compounds are held together by ionic bonds this type of bonding involves a complete transfer of electrons from metallic atoms to nonmetallic atoms
Ex. Ionic bonds within lithium fluoride
unlike molecular compounds in which atoms bond covalently to form "well-defined" units know as molecules, ionic compounds form formula units
Binary Ionic Compounds
These are compounds composed of 2 different ions (metallic + nonmetallic)
To write the name of a binary ionic compound:
1) name of first element
2) name of second element, ending change to ide
* prefixes are NOT used in name of binary ionic compounds
To write the name for a binary ionic compound:
1) determine the charge of each ion
2) balance charges by changing the number of each ion (subscript)
Ex. Determine the formula for the compound sodium oxide
1) Determine if the compound is ionic or molecular
2) If the compound is ionic determine the charge of each ion
3) Balance the charges
During the Activity
Get the students to find the determine the chemical formulas for the following compounds, ask then to just enter the number of each atom in the compound separated a comma.
Ex 1. sodium bromide
Ex 2. potassium sulfide
Ex 3. barium chloride
Ex 4. calcium nitride
Send learning check file to students allow 15 minutes to finish quiz.
After the Activity
Force collect from class analysis and then review in class analysis slide show.
Lead into the next topic of multi-valent compounds by asking students to balance the following examples in learning check.
Ex 1 iron nitride
Ex 2 vanadium sulfide
Ex 3 molybdenum phosphide
Ex 4 copper chloride