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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
The smallest among the following ions is
  • A
    $N{a^ + }$
  • B
    $M{g^{ + 2}}$
  • C
    $B{a^{2 + }}$
  • ✓
    $A{l^{3 + }}$
✓

Answer

Correct option: D.
$A{l^{3 + }}$
d
$(d)$ The size of an species decreases with increasing nuclear charge because the attraction for the electrons increases. Thus $A{l^{3 + }}$is smaller in size.

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