Shielding Effect
The shielding effect on valence electrons is maximum when the inner shells contain:
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About This Question
- Subject
- chemistry
- Chapter
- classification of elements and periodicity in properties
- Topic
- shielding effect
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
s electrons
Shielding (Screening) Effect is the reduction in nuclear attraction on valence electrons due to the presence of inner shell electrons.
- The effectiveness of shielding depends on the shape of the orbital. Orbitals closer to the nucleus screen more effectively.
- Order of Shielding: s>p>d>f.
- s-electrons have the highest penetration power and spherical symmetry, providing the most 'shadow' or protection from the nuclear charge for electrons in outer shells.
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.
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