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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
The correct order of atomic/ionic radii is
  • ✓
    $Sc >T i > V > C r$
  • B
    $Co > Ni > Cu > Zn$
  • C
    $S^{2-}>Cl^->O^{2-}>N^{3-}$
  • D
    None of these
✓

Answer

Correct option: A.
$Sc >T i > V > C r$
a
$(a)\,\, (a)\, Sc > Ti > V > Cr$ (size decrease initially in $3d-$ series)
          $(b) $ Correct order : $Zn > Cu > CO \approx Ni$
          $(c)$ Correct order : $S^{2-} > Cl^{-} > N^{3-} > O^{2-}$

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