Class 12 Chemistry D and F Block Elements Atomic radii

Atomic radii

  • The atomic radii of the elements of 3d-series decreases as the atomic number increases.
  • The atomic radii increase from 3d to 4d, the atomic radii of the 4d and 5d transition series are very close due to lanthanoid contraction. For example, Zirconium and Hafnium.
  • This decrease in the metallic radius due to increase in the atomic mass leads to an increase in the density of elements. Consequently the density increases from titanium to copper.

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