Shielding Effect
Mediumchemistry
Which subshell provides poorest shielding?
Select the correct option:
Solution
Incorrect! Answer:
f
- Shielding (Screening): The decrease in nuclear pull felt by valence electrons due to the presence of intervening inner electrons.
- Effectiveness Order: This depends on the spatial distribution (penetration) of orbitals: s>p>d>f.
- Why and how?:
- s orbitals have a spherical shape and get very close to the nucleus, providing excellent protection.
- d and f orbitals are 'diffuse' and geometrically less effective at 'covering' the nuclear charge.
- Consequence: Poor shielding by f-electrons is the fundamental cause of Lanthanide Contraction.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More shielding effect Practice Questions
About This Question
- Subject
- chemistry
- Chapter
- classification of elements and periodicity in properties
- Topic
- shielding effect
- Difficulty
- Medium
- Year
- 2025
This medium difficulty chemistry question is from the chapter classification of elements and periodicity in properties, covering the topic of shielding effect. It appeared in the 2025 exam. Practice this and similar questions to strengthen your understanding of classification of elements and periodicity in properties concepts.
Looking for more practice? Explore all chemistry questions or browse classification of elements and periodicity in properties questions on RankGuru.