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12 Nov 2021

Given information

Here the given elements are:

S, Mg, Al, Si

We have to determine the decreasing order of effective nuclear charge felt by the valence electrons of the given elements.

Step-by-step explanation

Step 1.

 

The term effective nuclear charge indicates the reduced nuclear charge which is effectively experienced by an electron in an atom, on account of the shielding effect due to other electrons.

 

The expression that is used to calculate the effective nuclear charge (Zeff) can be given as:

 

 

Here in the equation, 'Z' indicates the atomic number which represents the number of protons and 'S' indicates the shielded electrons.

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