Name ___________________________
Section ________
Date ____________
Group Members _______________________________________________________________
Section 4.1: Team Learning Worksheet
1. The formulas CaCl2 and CoCl2 look very similar. What is the name for each compound? Why do we name
them differently?
CaCl2 = Calcium Chloride (type 1 compound bc calcium is in column 2)
CoCl2 = Cobalt (II) Chloride (Type 2 compound bc cobalt is not in column 1,2,al,ag, or NH4+)
2. The formulas MgO and CO look very similar. What is the name for each compound? Why do we name them
differently?
MgO = Magnesium Oxide (type 1 compound bc calcium is in column 2)
CO = Carbon Monoxide (Type 3 compound bc carbon is not a metal)
3.
Explain how you use the periodic table to tell you that there are two chloride ions for every magnesium ion
in magnesium chloride. Then write the formulas for calcium oxide and potassium oxide.
Chlorine is in column 17 so it has a charge of 1-. Magnesium is in column 2 so it has a charge of 2+.
Two chloride ions are required to cancel out the charge of the magnesium ion.
Calcium oxide = CaO
Potassium oxide = K2O
4. Using the letters X and Y, write the general formula for an ionic compound formed by elements in the
following groups? Explain your reasoning.
a. Example: Group 1 with group 17
XY because group 1 has a 1+ charge and group 17 has a 1- charge.
b. Group 2 with group 17
XY2 because group 2 has a 2+ charge and group 17 has a 1- charge
c. Group 1 with group 16
X2Y because group 1 has a 1+ charge and group 16 has a 2- charge
d.
Group 2 with group 16
XY because group 2 has a 2+ charge and group 16 has a 2- charge
5. If you dissolve 10 “units” of iron(III) chloride, there will be ___40____ particle(s) in solution. The
formula for iron(III) chloride is _____FeCl3______________.
Name ___________________________
Section ________
Date ____________
Group Members _______________________________________________________________
6. If you dissolve 5 “units” of Pb(NO3)2, there will be __15_____ particle(s) in solution. The name of
Pb(NO3)2 is ______lead (II) nitrate________________.
7. If you dissolve 8 molecules of HCl, there will be ___16____ particle(s) in solution. The name of HCl
is ___Hydrochloric Acid__________________.
8.
If you dissolve 7 “units” of K2Cr2O7, there will be ___21____ particle(s) in solution. The name of
K2Cr2O7 is ______Potassium Dichromate_________________________.
9. If you dissolve 6 “units” of calcium hydroxide, there will be __18_____ particle(s) in solution. The
formula for calcium hydroxide is ____Ca(OH)2______________.
Explain any problems with each of the given names. Then, identify the formula for each compound with the
given name (there may be more than one possible answer) and provide the correct name for this compound
(some of the original names are correct)
Name
Barium dichloride
Problem
Should be named as a
type I
Formula
BaCl2
Correct name
Barium chloride
Carbon oxide
Should use prefixes bc
it’s a type 3
CO
Carbon Monoxide
Copper (II) sulfate
NONE
CuSO4
Iron oxide
Should have a roman
number bc its type 2
FeO
Diphosphorus
pentoxide
NONE
P2O5
Potassium sulfide
NONE
K2S
Perchloric acid
NONE
HClO4
Sulfur hexafluoride
NONE
SH6
Magnesium phosphide
NONE
Mg3P2
Calcium (II) nitrate
Should not have a
roman numeral bc it’s
a type 1
Ca(NO3)2
Iron (II) oxide
Calcium nitrate
Name ___________________________
Section ________
Date ____________
Group Members _______________________________________________________________