Unit 3 Chemical Compound Problems
Complete each question on your own paper.
1. Write the symbol for each element and identify each as a metal or non- metal.
a. barium
c. phosphorus
e. copper
g. potassium
b. lead
d. chlorine
f. arsenic
h. gold
i. sodium
j. tin
2. What are valence electrons?
3. Write the symbol, number of valence electrons, and charge of each element.
a. magnesium
c. phosphorus
e. oxygen
g. potassium
b. selenium
d. chlorine
f. sulfur
h. silicon
i. sodium
j. neon
4.
5.
6.
7.
8.
Identify each of the elements in Number 3 as a cation or an anion.
Draw the Bohr Models and Electron Dot Diagrams for each of the elements in Number 3 above.
What elements create ionic, covalent and metallic bonds?
What are the 7 diatomic gases? Name two allotropes.
For each of the following compounds indicate if it is ionic, covalent, or metallic.
a. NO3
d. Al(NO3)3
g. CCl4
b. NaCl
e. Fe2(SO4)3
h. H2
c. K2O
f. XeF2
i. Co3N2
9. Draw the Lewis structure for each of the following covalent compounds.
a. CF4
e. BF3
b. H2CS
f. CH2F2
c. PF3
g. H2S
d. F2
h. carbonate ion (CO32-)
10. Draw the Lewis Structure
a. CH4
a. C2H6
b. C3H8
c. C4H10
d. C5H12
for each organic compound.
f. CH3OH
l. CH2O
g. C2H5OH
m. CH3CHO
h. C3 H7OH
n. C2H5CHO
i. C2H4
o. HCN
j. C2H2
p. C2H4NH2
q. HCOOH
r. CH3COOH
s. C2H5COOH
11. Write formulas for the following covalent compounds.
a. Chlorine dioxide
e. selenium difluoride
b. Iodine tribromide
f. triphosphorus tetrabromide
c. Sulfur dioxide
g. dichorine monoxide
d. Dinitrogen pentoxide
h. dinitrogen triiodide
12. Write names for the following covalent compounds.
a. SiC
d. OF2
g. N2O5
b. CS2
e. SO2
h. NO
c. NO2
f. SO3
i. P4O10
13. Write formulas for the following ionic compounds.
a. Sodium fluoride
e. cesium chloride
b. Aluminum nitride
f. barium bromide
c. Aluminum bromide
g. cesium sulfide
d. Magnesium sulfide
h. potassium oxide
14.
Adapted from Dawn Wakely, Lindberg High School, 1999
i. NF3
j. O2
k. N2
l. nitrate ion (NO3-)
i.
j.
k.
l.
disulfur trioxide
tetrasulfur hexabromide
xenon hexafluoride
carbon tetrachloride
i.
j.
k.
l.
Gallium sulfide
potassium iodide
strontium nitride
aluminum iodide
j. PCl3
k. CI4
l. S2Cl6
15. Write formulas for the following ionic compounds.
a. scandium oxide
e. manganese V sulfide
b. nickel II nitride
f. silver chloride
c. zinc II chloride
g. gold bromide
d. nickel IV oxide
h. iron II phosphide
i. iron III phosphide
j. mercury I nitride
K. mercury II nitride
l. copper II iodide
16. Write formulas for the following ionic compounds.
a. silver nitrate
e. iron II sulfite
b. silver nitride
f. iron II sulfide
c. magnesium nitrite
g. aluminum oxide
d. iron II sulfate
h. aluminum oxalate
i.
k.
k.
l.
17. What is the charge on the metal of the following:
a. Al2O3
d. Cu(NO3)2
g. Fe(C2H3O2)2
b. ZnCO3
e. Ca(OH)2
h. Na2SO4
c. Au(NO3)3
f. Al2(SO4)3
i. Sn(NO2)2
ammonium acetate
ammonium sulfate
zinc II carbonate
cesium phosphate
j. KC2H3O2
k. CoC2O4
l. Ag3PO4
18. Name each of the following ionic compounds (Remember to place the roman numeral on transition
metals.).
a. Al2O3
d. Cu(NO3)2
g. Fe(C2H3O2)2
j. KC2H3O2
b. ZnCO3
e. Ca(OH)2
h. Na2SO4
k. CoC2O4
c. Au(NO3)3
f. Al2(SO4)3
i. Sn(NO2)2
l. Ag3PO4
19. Identify each of the following formulas as ionic or covalent. Write the name for each.
a. MgO
d. NaI
g. N2O5
j. Al2O3
b. CO
e. CaBr2
h. S2Cl3
k. PCl3
c. NO2
f. SO3
i. Rb2O
l. Ga2S3
20. Write the name or formula for the following (both ionic and covalent compounds).
a. Aluminum chloride
h. dinitrogen pentoxide
o. MnO2
b. Cobalt II chloride
i. Cobalt
p. cobalt III fluoride
c. Al2S3
j. N2O3
q. CCl4
d. HgO
k. iron II chlorate
r. aluminum nitrate
e. CS2
l. Cr2O3
s. Ni3P2
f. CO
m. CO3-3
t. NO2
-2
g. Oxygen gas
n. SO3
u. PO5
21. Write the formula or name of the following (both ionic and covalent compounds).
a. C2O4
f. Sn(NO3)2
k. dinitrogen tetroxide
b. Copper II chloride
g. K2Cr2O7
l. potassium oxalate
c. Al(NO3)3
h. Ni2C2O4
s. Hg(NO3)2
d. CuCO3
i. Aluminum fluoride
n. XeCl4
e. H2CO3
j. vanadium IV carbonate
o. Bi(NO3)2
22. What is the difference between a(n) atom, molecule, element, compound, and a mixture? Give an
example of each.
23. Give an example of the following:
a. A radical
d. a nonmetal atom
b. A negative radical
e. a compound
c. A metal ion
f. a transition metal
24. Explain clearly the difference between Co and CO.
Adapted from Dawn Wakely, Lindberg High School, 1999
g. a metal atom
h. an anion
i. A positive radical
j. a metal ion
k. diatomic gas
m. a mixture