Question

Rules for calculating the value of shielding constant?

Answer 1

shielding effect:-)

it is the interelectronic repulsion in between electrons of same orbital and the valence shell electrons is known as shielding effect.

RULE 1 :-

value of Sigma

for electrons of same subshell is equals to 0.35

RULE 2:-

electrons of s and p subshell which has

(n -1)shell value of Sigma equals to 0.85 .

RULE :- 3

electron of s and p subshell has (n -2) shell value of Sigma equals to 1 .

RULE 4:-

for electrons of d and f subshell left side electrons has Sigma value equals to 1.

example:- Na has Sigma value is equals to 2.2.