The electronic configurations of the first four members of the actinide series cannot be…
Chemistry · JEE Main · NTA Exams — d- and f-Block Elements
The electronic configurations of the first four members of the actinide series cannot be written accurately in a regular manner because of
- small difference in energy between 5f and 6d orbitals
- large difference in energy between 5f and 6d orbitals
- small difference in energy between 5f and 6s orbitals
- violation of the Pauli exclusion principle
Answer
(A) small difference in energy between 5f and 6d orbitals
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