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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 element having following electronic configurations has minimum ionization potential
  • A
    $1{s^1}$
  • B
    $1{s^2},\,2{s^2}\,2{p^6}$
  • ✓
    $1{s^2},\,2{s^2}\,2{p^6},\,3{s^1}$
  • D
    $1{s^2},\,2{s^2}\,2{p^2}$
✓

Answer

Correct option: C.
$1{s^2},\,2{s^2}\,2{p^6},\,3{s^1}$
c
(c) $1{s^2}2{s^2}2{p^6}3{s^1}$.

It belongs to $IA$ group which has least ionization potential and it decreases down the group

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