What is electrons shielding?

What is electrons shielding?
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•The shielding effect describes the decrease in attractionbetween an electron and the nucleus in any atom with more than oneelectron shell.•It is also referred to as the screening effect or atomicshielding.•Shielding electrons are the electrons in the energy levelsbetween the nucleus and the valence electrons. They are called"shielding" electrons because they "shield" the valence electronsfrom the force of attraction exerted by the positive charge in thenucleus.Also, it has trends in the Periodic Table
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