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More number of oxidation states are exhibited by the actinides than those by the lanthanides, the main reason being

Options

  1. AMore reactive nature of the actinides than the lanthanides
  2. B4f orbitals more diffused than the 5f orbitals
  3. CMore energy difference between 5f and 6d than between 4f and 5d orbitals
  4. DLesser energy difference between 5f and 6d than between 4f and 5d orbitals

Correct answer

D. Lesser energy difference between 5f and 6d than between 4f and 5d orbitals

Step-by-step solution

Actinides show different oxidation states such as +2, +3, +4, +5, +6 and +7 . However +3 oxidation state is most common among all the lanthanides.The wide range of oxidation states of actinides is attributed to the fact that the 5f ,6d and 7s energy levels are of comparable energies. Therefore all these three subshells can participate.

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