Question

The screening effect constant value is determined by the _____ rules ​

Answer 1

In many atoms, each electron is said to experience less than the actual nuclear charge because of shielding or screening by the other electrons. For each electron in an atom, Slater's rules provide a value for the screening constant, denoted by σ.

The effective nuclear charge may be defined as the actual nuclear charge (Z) minus the screening effect caused by the electrons intervening between the nucleus and valence electron.

Effective nuclear charge, Z* = Z - σ Where, Z= Atomic number, σ = Shielding or screening constant.

To calculate the effective nuclear charge (Z*) we need the value of screening constant (σ) which can be calculated by using following 

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