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JEE Main 202528 JanuaryMorning Shift

Exam: JEE Main
Year: 2025
Date: 28 January
Shift: Morning Shift
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

JEE Main 2025 · 28 January · Morning Shift · Chemistry · Classification of Elements and Periodicity in Properties

The incorrect decreasing order of atomic radii is

The incorrect decreasing order of atomic radii is

Options

A $\mathrm{Si}\gt\mathrm{P}\gt\mathrm{Cl}\gt\mathrm{F}$
B $\mathrm{Be}\gt\mathrm{Mg}\gt\mathrm{Al}\gt\mathrm{Si}$
C $\mathrm{Al}\gt\mathrm{B}\gt\mathrm{N}\gt\mathrm{F}$
D $\mathrm{Mg}\gt\mathrm{Al}\gt\mathrm{C}\gt\mathrm{O}$

Correct answer

B. $\mathrm{Be}\gt\mathrm{Mg}\gt\mathrm{Al}\gt\mathrm{Si}$

Step-by-step solution

Correct order of atomic radii :

\mathrm{Be} < \mathrm{Mg}>\mathrm{Al}>\mathrm{Si}

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