Which Arrangement Is in the Correct Order of Decreasing Radii $\mathrm{As}^{3-}>\mathrm{Br}^{-}>\mathrm{K}^{+}$

question 173

Multiple Choice

Which arrangement is in the correct order of decreasing radii?

• A) \( \mathrm{As}^{3-}>\mathrm{Br}^{-}>\mathrm{K}^{+} \)
• B) \( \mathrm{F}^{-}>\mathrm{Mg}^{+}>\mathrm{Cs} \)
• C) \( \mathrm{Na}^{+}>\mathrm{Cs}^{+}>\mathrm{I}^{-} \)
• D) \( \mathrm{Be}>\mathrm{Ba}^{+}>\mathrm{O}^{2-} \)
• E) \( \mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{K}^{+} \)

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Definitions:

Compounds

Substances formed from two or more elements that are chemically combined in fixed ratios.

Molecular Formula

A notation representing the number and type of atoms in a molecule without indicating how the atoms are bonded.

Line-Angle Structure

A simplified diagrammatic representation of chemical structures where the ends and bends of lines represent carbon atoms.

Condensed Formulas

A method of writing a formula for organic molecules in a linear form that shows the arrangement of atoms without displaying bonds.