Actinoid contraction

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1. 1 2022 Phase 2 The d- and f-Block Elements #
   Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to:
   A 5 f orbitals have greater shielding effect B 4 f orbitals are penultimate C 4 f orbitals have greater shielding effect D 5 f orbitals have poor shielding effect
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