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Periodic Table and Periodicity question

2022 · Q112
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Periodic Table and Periodicity question

2022 · Q112

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1

Decrease in size from left to right in actinoid series is greater and gradual than that in lanthanoid series due to

  1. A
    5f orbitals have greater shielding effect
  2. B
    4f orbitals are penultimate
  3. C
    4f orbitals have greater shielding effect
  4. D
    5f orbitals have poor shielding effect
View written solutionFree

Correct answer: D

Due to more diffused nature of 5f orbitals as compared to 4f orbitals the shielding effect of 5f is poor, resulting in the decrease in size from left to right in actinoid series which is greater and gradual than that in lanthanoid series.

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