A) small energy difference between 5f and 6d levels
B) overlapping of inner orbitals
C) free movement of electrons over all the orbitals
D) All of the above
Correct Answer: A
Solution :
Since, there is a very small difference between the energies of \[5f\] and 6d levels, thus the electron can go to 6d level or can remain in \[5f\] level. Hence, the electronic configuration of actinides cannot be assigned with degree of certainty.
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