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What is screening effect ?...

What is screening effect ?

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Screening effect: The repulsive force between inner shell electrons and the valence electrons leads to a decrease in the electrostatic attractive forces acting on the valence electrons by the nucleus. Thus the inner shell electrons act as a shield between the nucleus and the valence electrons. This effect is called shielding effect (or) screening effect.
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FULL MARKS-PERIODIC CLASSIFICATION OF ELEMENTS -Textual Evaluation Solved( II brief question)
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