Atomic Orbitals
Which of the following orbitals does not exist?
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About This Question
- Subject
- chemistry
- Chapter
- atomic structure
- Topic
- atomic orbitals
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
2d
The existence of an orbital is determined by the constraint l<n.
- 3d: n=3,l=2⟹2<3 (Exists)
- 2d: n=2,l=2⟹ Not allowed, since l must be less than 2 (0 or 1)
- 4f: n=4,l=3⟹3<4 (Exists)
- 5s: n=5,l=0⟹0<5 (Exists) Thus, a '2d' orbital is theoretically impossible as the second shell only has 's' (l=0) and 'p' (l=1) subshells.
This easy difficulty chemistry question is from the chapter atomic structure, covering the topic of atomic orbitals. It appeared in the 2025 exam.
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