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More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is :

  1. A
    more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  2. B
    lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  3. C
    greater metallic character of the lanthanoids than that of the corresponding actinoids
  4. D
    more active nature of the actinoids

Solution & Step-by-step Explanation

Actinoids show a wider range of oxidation states because the energy difference between the , , and orbitals is very small, allowing electrons from all these subshells to participate in bond formation.

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More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is :
A
more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
B
lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
C
greater metallic character of the lanthanoids than that of the corresponding actinoids
D
more active nature of the actinoids

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d and f block elements

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