JEE · NEET Previous Year Question
In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.
Topic: JEE PYQ
Answer: C. Full step-by-step solution below.
- ARb & Br
- BK & Se
- CK & Br
- DNa & Cl
Correct answer: C
Solution
(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.More Periodic Table & Periodicity PYQs
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