The value of screening constant (σ) for N-atom is 3.10 and that for O-atom is

Question

The value of screening constant (σ) for N-atom is 3.10 and that for O-atom is (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

N (1 s2)(2 s2 2 p3) ; σ=3.1 O (1 s2)(2 s2 2 p4) ; σ=3.1+0.35=3.45

Q. The value of screening constant $(σ)$ for $N$ -atom is $3.10$ and that for $O$ -atom is