Class 12 Chemistry D and F Block Elements Ionisation Enthalpies

Ionisation Enthalpies

  • Transition elements have small size which results in high ionization energy.
  • They exhibit less electro positivity than the s-block elements due to their ionization potentials lying between S and P block elements.
  • They form covalent compounds.
  • The d-block elements exhibit an increase in the ionization potentials from left to right due to the screening effect of the new electrons added into the (n-1) d subshell. 
  • The first transition series exhibit an increase in the second ionisation energies with the increase in atomic number due to stable electronic configuration.
  • Ionization energy decreases down the group.
  • Ionization energy increases across the period.

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