Quantum Numbers
Maximum number of electrons possible in the shell with n = 4 is:
Select the correct option:
Solution
32
- Orbital Capacity: According to Pauli's Exclusion Principle, each orbital can hold a maximum of 2 electrons with opposite spins.
- Shell Capacity Formula: Since there are n2 orbitals in a shell, the maximum number of electrons is 2n2.
- Calculation for n=4:
- Number of orbitals =n2=42=16.
- Maximum electrons =2×16=32.
- Subshell Breakup:
- 4s (2) + 4p (6) + 4d (10) + 4f (14) = 32.
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About This Question
- Subject
- chemistry
- Chapter
- atomic structure
- Topic
- quantum numbers
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
32
- Orbital Capacity: According to Pauli's Exclusion Principle, each orbital can hold a maximum of 2 electrons with opposite spins.
- Shell Capacity Formula: Since there are n2 orbitals in a shell, the maximum number of electrons is 2n2.
- Calculation for n=4:
- Number of orbitals =n2=42=16.
- Maximum electrons =2×16=32.
- Subshell Breakup:
- 4s (2) + 4p (6) + 4d (10) + 4f (14) = 32.
This easy difficulty chemistry question is from the chapter atomic structure, covering the topic of quantum numbers. It appeared in the 2025 exam.
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