A) lesser energy difference between \[5f\] and 6d-orbitals than that between \[4f\] and \[5d-\]orbitals
B) greater metallic character of the lanthanoids than that of the corresponding actinoids
C) more active nature of the actinoids
D) more energy difference between \[5f\]and \[6f-\]orbitals than that between \[4f\] and\[5d-\]orbitals
Correct Answer: A
Solution :
The energy difference between \[5f\] and 6d orbitals is less than that between \[4f\] and 5d orbitals. Therefore, actinoids (having valence electrons in \[5f\] and 6d) exhibit more number of oxidation states.
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