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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
When first ionisation energy is plotted against the atomic number, the peaks in curve are occupied by
  • A
    halogens
  • ✓
    rare gases
  • C
    alkali metals
  • D
    transition elements
✓

Answer

Correct option: B.
rare gases
b
Generally, the first ionization energy increases as we go across a period.

Hence, the maximum peaks in the curve are occupied by rare gases. This is because they require more energy to disturb the stable configuration that they have attained

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