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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
Which ion has largest radius
  • ✓
    $Se^{2-}$
  • B
    $F^-$
  • C
    $O^{-2}$
  • D
    $Rb^+$
✓

Answer

Correct option: A.
$Se^{2-}$
a
For species having same balance electron. Radii is inversely proportional to protons.

So, $r \propto \frac{e^{-}}{p}$

Hence, $r = se ^{2-}\,>\, Rb ^{+}$

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