Question

State the reasons for periodicity of elements in periods and groups.

  • Periodic Table
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Answer

Reasons for Periodicity in properties in periods and groups is as follows —

  1. Similar valence shell electronic configurations recur at definite intervals of atomic numbers.
  2. Element properties depend on the number and arrangement of electrons in their shells, including valence shells.
  3. Changes in properties within the same period or group are due to gradual changes in electronic configuration.

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