Periodic Classification of Elements (C10)

Explain giving justification the trends in the following properties of elements, on moving from left to right in a period, in the Modern periodic Table.

  1. Variation of valency.
  2. Change of atomic radius.
  3. Metallic to non-metallic character.
  4. Electronegative character.
  5. Nature of oxides.


a) Valency first increases, then decreases

b) Decreases

c) Increases

d) Increases

e) Changes from basic to acidic