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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
Minimum first ionisation energy is shown by which electronic configuration
  • A
    $1s^2, 2s^2, 2p^5$
  • B
    $1s^2, 2s^2, 2p^6, 3s^2, 3p^1$
  • ✓
    $1s^2, 2s^2, 2p^6, 3s^1$
  • D
    $1s^2, 2s^2, 2p^6$
✓

Answer

Correct option: C.
$1s^2, 2s^2, 2p^6, 3s^1$
c
Alkali metals have lowest $I.E.$

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