JEE Main Chemistry question

If the ionic radii of and are taken to be about 1.34 Å each, then the expected values of the atomic radii of K and F should be respectively:

(A)1.34 and 1.34 Å
(B)2.31 and 0.64 ÅCorrect
(C)0.64 and 2.31 Å
(D)2.31 and 1.34 Å

Answer: (B)

Solution

A cation is always smaller than its parent neutral atom (an electron is lost, reducing electron-electron repulsion and shell size), while an anion is always larger than its parent atom (an electron is gained, increasing repulsion and shell size). So the neutral K

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Question ID VK-133648