Practice: Ionic Compounds
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Practice: Ionic Compounds

Practice with Determining Names and Formulas for Ionic Compounds

Now work through the following exercise (also shown in exercise 7 in your workbook) and check your answers at the end of this page. If you have questions about any of the answers, check with the instructor. Then continue with the lesson.

Determining Ionic Formulas and Naming Ionic Compounds

For each of the following pairs of elements, use the periodic table to decide the charge on both the cation and anion and determine the formula of the compound(s) formed in each case. When writing the formulas put the cation first. For transition metals the common ionic charges are given. Name each of the compounds formed.

Elements Compound Formula Compound Name
Mg Br    
K S    
Cl Al    
S Cu (+1, +2)    
F Zn (+2)    
O Co (+2, +3)    
aluminum oxygen    
calcium iodine    





Elements Compound Formula Compound Name
Mg Br MgBr2 magnesium bromide
K S K2S potassium sulfide
Cl Al AlCl3 aluminum chloride
S Cu (+1, +2) Cu2S copper(I) sulfide
CuS copper(II) sulfide
F Zn (+2) ZnF2 zinc fluoride
O Co (+2, +3) CoO cobalt(II) oxide
Co2O3 cobalt(III) oxide
aluminum oxygen Al2O3 aluminum oxide
calcium iodine CaI2 calcium iodide


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E-mail instructor: Eden Francis

Clackamas Community College
1998, 2002 Clackamas Community College, Hal Bender