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An Intiative by Sri Chaitanya
a
lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals.
b
more active nature of the actinoids.
c
more 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.
answer is C.
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