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Comment on the chemical reactivity of d-block and f-block elements.

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  • d-block (transition) elements and f-block (inner transition) elements exhibit very small change in atomic radii.
  • Therefore, the transition and inner transition elements belonging to the individual series have similar chemical properties.
  • Their ionization enthalpies are intermediate between those of s-block and p-block elements. Thus, d-block and f-block elements generally show moderate reactivity.

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