Chemistry · Various quantum numbers (principal, angular momentum and magnetic quantum numbers) and their significance
The shielding constant ' for atom is :
The shielding constant ' \( \sigma^{\prime} \) for \( _{7} N \) atom is :
- A. 3.10
- B. 3.40
- C. 3.80
- D. 4.20
Step-by-step solution
Using Slater's rules for nitrogen (atomic number 7, electron configuration 1s² 2s² 2p³), the shielding constant σ for a 2p electron is calculated as: contributions from other electrons in the same n=2 group (4 electrons × 0.35 = 1.40) plus electrons in the n-1=1 shell (2 electrons × 0.85 = 1.70), giving a total σ = 1.40 + 1.70 = 3.10.
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