Actinides exhibit more number of oxidation states than lanthanides because of lesser energy difference between the 5f and 6d orbitals than that between the 4f and 5d orbitals. Related Theory Actinides have a very small energy gap between 5f and 6d orbitals, so they can easily form a variety of configurations and hence they are found to be stable in various oxidation states. Lanthanides are comparatively less electropositive than actinides and due to that reason, they are less reactive than actinides.
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:
NEET UG 2006 — Chemistry Inorganic Chemistry
2006mcqeasy
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:
Official previous-year question
Held on 30 Apr 2006 · Verified 9 Jul 2026.
Options
- A
more active nature of the actinoids
- B
more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
- C
lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
- D
greater metallic character of the lanthanoids than that of the corresponding actinoids
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