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JEE MAIN 2026
28-01-2026 S1
Question
In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.
Select the correct option:
A
$\mathrm{Na} \& \mathrm{Cl}$
B
$\mathrm{K} \& \mathrm{Se}$
C
$\mathrm{K} \& \mathrm{Br}$
D
$\mathrm{Rb} \& \mathrm{Br}$
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
In a period moving from left to right atomic size decreases.
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Chemistry
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