CHEM 103 EXAM 2 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
Q: Which property measures how easily an atom can shed an electron to create a
cation (positive ion)?
a. Electron affinity
b. Atomic number
c. Electronegativity
d. Ionization energy
e. None of the above
A: ✔️✔️ d. Ionization energy (This is the specific energy required to remove an
electron from a gaseous atom.)
Q: What is the most likely electrical charge for an ion of Aluminum?
a. 5-
b. 2+
c. 1-
d. 3+
e. 1+
A: ✔️✔️ d. 3+ (Aluminum is in Group 13 and typically loses its three valence
electrons to achieve a stable configuration.)
The oxidation number of Sulfur in Calcium sulfate, CaSO4, is
a. +2
b. +4
c. 0
, d. +6
e. -2
d. +6
Which of the following compounds is likely to have ionic bonds between the
atoms?
a. CaCl2
b. CH4
c. SO2
d. NBr3
e. all of these have covalent bonds
a. CaCl2
Which is the correct formula for the ionic compound containing iron (III) ions
and oxide ions?
a. FeO2
b. Fe2O3
c. Fe3O2
d. FeO
e. Fe2O2
b. Fe2O3
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT!!!
Q: Which property measures how easily an atom can shed an electron to create a
cation (positive ion)?
a. Electron affinity
b. Atomic number
c. Electronegativity
d. Ionization energy
e. None of the above
A: ✔️✔️ d. Ionization energy (This is the specific energy required to remove an
electron from a gaseous atom.)
Q: What is the most likely electrical charge for an ion of Aluminum?
a. 5-
b. 2+
c. 1-
d. 3+
e. 1+
A: ✔️✔️ d. 3+ (Aluminum is in Group 13 and typically loses its three valence
electrons to achieve a stable configuration.)
The oxidation number of Sulfur in Calcium sulfate, CaSO4, is
a. +2
b. +4
c. 0
, d. +6
e. -2
d. +6
Which of the following compounds is likely to have ionic bonds between the
atoms?
a. CaCl2
b. CH4
c. SO2
d. NBr3
e. all of these have covalent bonds
a. CaCl2
Which is the correct formula for the ionic compound containing iron (III) ions
and oxide ions?
a. FeO2
b. Fe2O3
c. Fe3O2
d. FeO
e. Fe2O2
b. Fe2O3
