CHEM 1101 01---Introduction to
Chemistry Exam
True or False. An atom of magnesium has two valence electrons.
Select one:
True
False - ✔✔ correct answer True
True or False. Based on their respective locations on the periodic table, sodium and sulfur are
expected to share similar chemical and physical properties.
Select one:
True
False - ✔✔ correct answer False
True or False. N3O5 is an example of an ionic compound.
Select one:
True
False - ✔✔ correct answer False
True or False. Six valence electrons are shared in a triple covalent bond.
Select one:
True
False - ✔✔ correct answer True
Calcium chloride is commonly used to deice roads and sidewalks. Which one of the following is the
correct chemical formula of calcium chloride?
a. CaCl2
b. CaCl
c. CaCl3
d. Ca2Cl - ✔✔ correct answer a. CaCl2
Which statement is true for the following chemical equation?
, CHEM 1101 01---Introduction to
Chemistry Exam
C120H240 + 180 O2 ⟶⟶ 120 CO2 + 120 H2O
a. The equation is balanced.
b. The equation is unbalanced because the hydrogen atoms are unbalanced.
c. The equation is unbalanced because the oxygen atoms are unbalanced.
d. The equation is unbalanced because the carbon atoms are unbalanced. - ✔✔ correct answer a.
The equation is balanced.
Which one of the following is not the name of a polyatomic ion?
a. hydroxide
b. sulfide
c. sulfite
d. sulfate - ✔✔ correct answer b. sulfide
A new element, Idahoium, was discovered and given the chemical symbol Id. If the atomic mass of
Idahoium is 110.00 amu. Which one of the following is the formula mass of the compound with the
formula Id2S2?
a. 147.06 amu
b. 348.24 amu
c. 284.12 amu
d. 179.12 amu - ✔✔ correct answer c. 284.12 amu
Which one of the following is the charge of an ion with 40 protons and 42 electrons?
a. -2
b. -1
c. +2
d. +1 - ✔✔ correct answer a. -2
Which one of the following is the chemical formula of a substance composed of two lithium ions and
one sulfate ion?
a. LiS2
b. Li2S
Chemistry Exam
True or False. An atom of magnesium has two valence electrons.
Select one:
True
False - ✔✔ correct answer True
True or False. Based on their respective locations on the periodic table, sodium and sulfur are
expected to share similar chemical and physical properties.
Select one:
True
False - ✔✔ correct answer False
True or False. N3O5 is an example of an ionic compound.
Select one:
True
False - ✔✔ correct answer False
True or False. Six valence electrons are shared in a triple covalent bond.
Select one:
True
False - ✔✔ correct answer True
Calcium chloride is commonly used to deice roads and sidewalks. Which one of the following is the
correct chemical formula of calcium chloride?
a. CaCl2
b. CaCl
c. CaCl3
d. Ca2Cl - ✔✔ correct answer a. CaCl2
Which statement is true for the following chemical equation?
, CHEM 1101 01---Introduction to
Chemistry Exam
C120H240 + 180 O2 ⟶⟶ 120 CO2 + 120 H2O
a. The equation is balanced.
b. The equation is unbalanced because the hydrogen atoms are unbalanced.
c. The equation is unbalanced because the oxygen atoms are unbalanced.
d. The equation is unbalanced because the carbon atoms are unbalanced. - ✔✔ correct answer a.
The equation is balanced.
Which one of the following is not the name of a polyatomic ion?
a. hydroxide
b. sulfide
c. sulfite
d. sulfate - ✔✔ correct answer b. sulfide
A new element, Idahoium, was discovered and given the chemical symbol Id. If the atomic mass of
Idahoium is 110.00 amu. Which one of the following is the formula mass of the compound with the
formula Id2S2?
a. 147.06 amu
b. 348.24 amu
c. 284.12 amu
d. 179.12 amu - ✔✔ correct answer c. 284.12 amu
Which one of the following is the charge of an ion with 40 protons and 42 electrons?
a. -2
b. -1
c. +2
d. +1 - ✔✔ correct answer a. -2
Which one of the following is the chemical formula of a substance composed of two lithium ions and
one sulfate ion?
a. LiS2
b. Li2S
