Published by:
CGP EDU Academic Team
Published on: August 13, 2026
In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.
A
B
C
K & Br
D
Text Solution
Verified by ExpertsThe correct answer is:
C
In period 4, atomic radii decrease from left to right as nuclear charge increases while electron shell remains constant. K (potassium) is at the extreme left of period 4 metals and has the highest atomic radius. Br (bromine) is near the right end as a nonmetal and has the lowest atomic radius in this period. Therefore, the elements with highest and lowest atomic radii in period 4 are K and Br respectively.
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