Home Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius In the ionic compound KF, the K + and F – io…
Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius Subjective Type
Published on: August 14, 2026

In the ionic compound KF, the K + and F – ions are found to have practically identical radii, about 1.34 Å each. What can you predict about the relative atomic radii of K & F ?

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Atomic radius of K is larger than F because the size of cation is smaller than its parent atom while size of anion is bigger than its parent atom. Thus, atomic radii of K will be greater than 1.34 Å while atomic radii of F will be less than 1.34 Å.

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