NEET UG CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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If the ionic radii of

{\mathrm{K}^ + }

and

{\mathrm{F}^ - }

are about 1.34 Å each, then the expected values of atomic radii of

\mathrm{K}

and

\mathrm{F}

should be respectively:

View answer and explanation

Correct option: B

2.31\,and\,\,0.64\,{A^0}

Option B (

2.31\,and\,\,0.64\,{A^0}

) is correct because a potassium atom is larger than its ion

{\mathrm{K}^ + }

due to the loss of an electron, and a fluorine atom is smaller than its ion

{\mathrm{F}^ - }

due to the gain of an electron.

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