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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: Classification of Elements and Periodicity in Properties

Olympiad workbook · NSEC · Classification of Elements and Periodicity in Properties

The correct order of ionic radii of Rb^ + , Br^ - , Sr^ 2+ and Se^...

The correct order of ionic radii of

\mathrm{Rb}^{+}, \mathrm{Br}^{-}, \mathrm{Sr}^{2+}

and

\mathrm{Se}^{2-}

is

Options

A $\mathrm{Rb}^{+} < \mathrm{Br}^{-} < \mathrm{Sr}^{2+} < \mathrm{Se}^{2-}$
B $\mathrm{Sr}^{2+} < \mathrm{Rb}^{+} < \mathrm{Br}^{-} < \mathrm{Se}^{2-}$
C $\mathrm{Se}^{2-} < \mathrm{Br}^{-} < \mathrm{Sr}^{2+} < \mathrm{Rb}^{+}$
D $\mathrm{Se}^{2-} < \mathrm{Sr}^{2+} < \mathrm{Rb}^{+} < \mathrm{Br}^{-}$

Correct answer

B. $\mathrm{Sr}^{2+} < \mathrm{Rb}^{+} < \mathrm{Br}^{-} < \mathrm{Se}^{2-}$

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