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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 electronic configuration with the highest ionization enthalpy is
  • A
    $[Ne]\, 3s^2\,3p^1$
  • B
    $[Ne]\, 3s^2\,3p^2$
  • ✓
    $[Ne]\, 3s^2\,3p^3$
  • D
    $[Ar]\, 3d^{10}\,4s^2\,4p^3$
✓

Answer

Correct option: C.
$[Ne]\, 3s^2\,3p^3$
c
The smaller the atomic size, larger is the value of $IP$. Further the atoms having half filled or fully filled orbitals are comparatively more stable, hence more energy required to remove the electron from such atoms.

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