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Periodic Table - Groups & Periods
Lanthanides and actinides are usually displayed in which part of the periodic table?
A. Two rows below the main table
B. Between Groups 17 and 18 only
C. Above hydrogen
D. Inside Group 1 only
Correct Answer: A
The f-block elements are commonly shown separately below to keep the table compact.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
Which block contains most transition metals?
A. s-block only
B. p-block only
C. d-block
D. f-block only
Correct Answer: C
Transition metals occupy the d-block in the center of the periodic table.
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Periodic Table - Groups & Periods
The period number of a main-group element broadly corresponds to what?
A. Number of occupied principal electron shells
B. Number of isotopes
C. Atomic mass divided by two
D. Number of neutrons
Correct Answer: A
For main-group elements, period number indicates the highest occupied principal shell.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
Across a period from left to right, atomic number generally does what?
A. Doubles each step
B. Remains constant
C. Increases by one from element to element
D. Decreases randomly
Correct Answer: C
The periodic table is ordered by increasing atomic number.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
Which group contains the noble gases?
A. Group 18
B. Group 17
C. Group 2
D. Group 16
Correct Answer: A
Group 18 contains the noble gases.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
Which group contains the halogens?
A. Group 14
B. Group 1
C. Group 17
D. Group 18
Correct Answer: C
Fluorine, chlorine, bromine and iodine are halogens in Group 17.
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Periodic Table - Groups & Periods
Which group contains the alkali metals?
A. Group 17
B. Group 1
C. Group 2
D. Group 18
Correct Answer: B
Group 1 contains Li, Na, K and other alkali metals, excluding hydrogen's special classification.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
Elements in the same group often have similar chemical properties because they have similar what?
A. Physical sizes only
B. Valence-electron configurations
C. Neutron counts
D. Mass numbers
Correct Answer: B
Shared outer-electron patterns give group members similar chemistry.
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Periodic Table - Groups & Periods
What are the horizontal rows in the periodic table called?
A. Periods
B. Groups
C. Orbitals
D. Families only
Correct Answer: A
Horizontal rows are periods.
CSS - PMS - CCE - PCS - General Science
Periodic Table - Groups & Periods
What are the vertical columns in the periodic table called?
A. Groups
B. Shells
C. Blocks only
D. Periods
Correct Answer: A
Vertical columns are groups.