Basics of the Periodic Table — Homi Bhabha Exam Chemistry MCQs with Solutions
Free Homi Bhabha Exam Chemistry Basics of the Periodic Table MCQs with step-by-step solutions (8 questions). Part of Periodic Classification & Chemical Bonding. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Basics of the Periodic Table · medium · theory
Mendeleev arranged the elements in his periodic table in order of increasing:
A. valency
B. density
C. atomic number
D. atomic mass ✓ Correct
Solution: Mendeleev's classification was based on increasing atomic mass and similarity of properties.
Q2 — Basics of the Periodic Table · hard · theory
The modern periodic table arranges elements in order of increasing:
A. atomic mass
B. atomic number ✓ Correct
C. density
D. number of neutrons
Solution: Moseley showed atomic number is the fundamental property, so the modern table is arranged by it.
Q3 — Basics of the Periodic Table · medium · theory
The horizontal rows of the periodic table are called:
A. groups
B. periods ✓ Correct
C. families
D. shells
Solution: Horizontal rows are periods; vertical columns are groups.
Q4 — Basics of the Periodic Table · medium · theory
The vertical columns of the periodic table are called:
A. periods
B. groups ✓ Correct
C. orbits
D. blocks
Solution: Vertical columns are groups; elements in a group have similar properties.
Q5 — Basics of the Periodic Table · medium · theory
The modern periodic table has ______ periods and ______ groups:
A. 18 periods and 7 groups
B. 8 periods and 8 groups
C. 7 periods and 18 groups ✓ Correct
D. 7 periods and 8 groups
Solution: There are 7 periods (rows) and 18 groups (columns) in the modern periodic table.
Q6 — Basics of the Periodic Table · hard · theory
The elements of Group 1 (except hydrogen) are called:
A. noble gases
B. alkali metals ✓ Correct
C. alkaline earth metals
D. halogens
Solution: Group 1 metals (Li, Na, K, …) are the highly reactive alkali metals.
Q7 — Basics of the Periodic Table · hard · theory
The very unreactive elements placed in Group 18 are the:
A. noble (inert) gases ✓ Correct
B. transition metals
C. alkali metals
D. halogens
Solution: Group 18 contains the noble gases (He, Ne, Ar, …) which have complete outer shells.
Q8 — Basics of the Periodic Table · medium · theory
The elements of Group 17, such as fluorine and chlorine, are called:
A. metalloids
B. noble gases
C. halogens ✓ Correct
D. alkali metals
Solution: Group 17 elements are the halogens, which are reactive non-metals.