मराठी

Periodic Trends in Properties of Elements

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Estimated time: 2 minutes
CBSE: Class 12

Key Points: Periodic Trends in Properties

  • Periodic trends are regular changes in properties across periods and down groups.
  • These trends depend on atomic number and electronic configuration.
  • Across a period, the effective nuclear charge increases.
  • Down a group, the number of shells increases.
  • Important trends include atomic radius, ionic radius, ionisation enthalpy, electron gain enthalpy and electronegativity.
  • Periodic trends help predict chemical reactivity.
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