CHEM 121 Module 8 | Foundations of General Chemistry
w/Lab Exam Q&A | Portage Learning
These are original practice questions written for study. They cover common CHEM 121
Module 8 | Periodic Properties of the Elements topics: periodic law, groups and
periods, metals/nonmetals/metalloids, effective nuclear charge, atomic and ionic
radius, ionization energy, electron affinity, electronegativity, metallic character, group
trends, transition metals, and clinical applications.
Question 1:
Who arranged the first widely accepted periodic table by increasing atomic mass?
A. Bohr
B. Mendeleev
C. Moseley
D. Dalton
Correct answer: B
Rationale: Mendeleev arranged elements by atomic mass and predicted undiscovered
elements.
Question 2:
The modern periodic table is arranged primarily by increasing:
A. Atomic mass
B. Atomic number
C. Density
D. Neutron number
Correct answer: B
Rationale: Modern periodic law is based on increasing atomic number.
Question 3:
Group 1A elements are called:
A. Alkaline earth metals
B. Halogens
C. Alkali metals
D. Noble gases
Correct answer: C
Rationale: Group 1A elements are the alkali metals.
,Question 4:
Group 2A elements are called:
A. Alkali metals
B. Alkaline earth metals
C. Halogens
D. Chalcogens
Correct answer: B
Rationale: Group 2A elements are the alkaline earth metals.
Question 5:
Group 7A elements are called:
A. Noble gases
B. Halogens
C. Alkali metals
D. Transition metals
Correct answer: B
Rationale: Group 7A elements are the halogens.
Question 6:
Group 8A elements are called:
A. Noble gases
B. Halogens
C. Alkaline earth metals
D. Metalloids
Correct answer: A
Rationale: Group 8A elements are the noble gases.
Question 7:
Elements in the same group have the same number of:
A. Neutrons
B. Protons
C. Valence electrons
D. Isotopes
Correct answer: C
Rationale: Group members share valence electron configurations.
, Question 8:
The period number of an element corresponds to its:
A. Number of valence electrons
B. Highest principal quantum number
C. Atomic mass
D. Number of neutrons
Correct answer: B
Rationale: The period indicates the highest occupied principal energy level.
Question 9:
Transition metals are found in which block?
A. s-block
B. p-block
C. d-block
D. f-block
Correct answer: C
Rationale: Transition metals are in the d-block.
Question 10:
Lanthanides and actinides are found in which block?
A. s-block
B. p-block
C. d-block
D. f-block
Correct answer: D
Rationale: Lanthanides and actinides are inner transition metals in the f-block.
Question 11:
Metalloids are located near the:
A. Bottom left of the periodic table
B. Staircase line
C. Top right corner only
D. Noble gas group
Correct answer: B
Rationale: Metalloids border the staircase line between metals and nonmetals.
w/Lab Exam Q&A | Portage Learning
These are original practice questions written for study. They cover common CHEM 121
Module 8 | Periodic Properties of the Elements topics: periodic law, groups and
periods, metals/nonmetals/metalloids, effective nuclear charge, atomic and ionic
radius, ionization energy, electron affinity, electronegativity, metallic character, group
trends, transition metals, and clinical applications.
Question 1:
Who arranged the first widely accepted periodic table by increasing atomic mass?
A. Bohr
B. Mendeleev
C. Moseley
D. Dalton
Correct answer: B
Rationale: Mendeleev arranged elements by atomic mass and predicted undiscovered
elements.
Question 2:
The modern periodic table is arranged primarily by increasing:
A. Atomic mass
B. Atomic number
C. Density
D. Neutron number
Correct answer: B
Rationale: Modern periodic law is based on increasing atomic number.
Question 3:
Group 1A elements are called:
A. Alkaline earth metals
B. Halogens
C. Alkali metals
D. Noble gases
Correct answer: C
Rationale: Group 1A elements are the alkali metals.
,Question 4:
Group 2A elements are called:
A. Alkali metals
B. Alkaline earth metals
C. Halogens
D. Chalcogens
Correct answer: B
Rationale: Group 2A elements are the alkaline earth metals.
Question 5:
Group 7A elements are called:
A. Noble gases
B. Halogens
C. Alkali metals
D. Transition metals
Correct answer: B
Rationale: Group 7A elements are the halogens.
Question 6:
Group 8A elements are called:
A. Noble gases
B. Halogens
C. Alkaline earth metals
D. Metalloids
Correct answer: A
Rationale: Group 8A elements are the noble gases.
Question 7:
Elements in the same group have the same number of:
A. Neutrons
B. Protons
C. Valence electrons
D. Isotopes
Correct answer: C
Rationale: Group members share valence electron configurations.
, Question 8:
The period number of an element corresponds to its:
A. Number of valence electrons
B. Highest principal quantum number
C. Atomic mass
D. Number of neutrons
Correct answer: B
Rationale: The period indicates the highest occupied principal energy level.
Question 9:
Transition metals are found in which block?
A. s-block
B. p-block
C. d-block
D. f-block
Correct answer: C
Rationale: Transition metals are in the d-block.
Question 10:
Lanthanides and actinides are found in which block?
A. s-block
B. p-block
C. d-block
D. f-block
Correct answer: D
Rationale: Lanthanides and actinides are inner transition metals in the f-block.
Question 11:
Metalloids are located near the:
A. Bottom left of the periodic table
B. Staircase line
C. Top right corner only
D. Noble gas group
Correct answer: B
Rationale: Metalloids border the staircase line between metals and nonmetals.
