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  1. Oct 2020
  2. chem.libretexts.org chem.libretexts.org
    7.2: Shielding and Effective Nuclear Charge
    2
    1. arnavkartikeya 08 Oct 2020
      Periodic Table. Except for hydrogen, (ZeffZeffZ_{eff} is always less than ZZZ, and (ZeffZeffZ_{eff} increases from left to right as you go across a row.

      The reason that the effictive nucelar charge resets every period is the fact that a new shell is now added so the distance is greater between electrons and the nucleus.

    2. arnavkartikeya 08 Oct 2020
      Therefore as we go from left to right on the periodic table the effective nuclear charge of an atom increases in strength and holds the outer electrons closer and tighter to the nucleus.

      left to right, Zeff goes up, radius size goes down

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