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Homework Help: Ionization energy and Z effective

  1. Nov 28, 2011 #1


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    1. The problem statement, all variables and given/known data
    Consider an alkali atom in its fundamental state and assume that its valence electron experiment a constant shielding with [itex]Z_{eff}>1[/itex]. Use the tabulated values of the ionization energy to estimate [itex]Z_{eff}[/itex] for the Li, Na and K atoms.

    2. Relevant equations
    I do not know.

    3. The attempt at a solution
    Z effective is the effective charge (in units of electron charge) the valence electron feels. I've "cheated" and checked out Z effective and the ionization energies for all these atoms, yet I do not find any correlation.
    Ionization energies: (5.39, 5.14, 4.34) eV.
    Z effective: (1.25, 1.84, 2.26).
    I'm at a loss. Any tip is appreciated.
  2. jcsd
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