Effective Nuclear Charge

Effective Nuclear Charge - Effective Nuclear Charge In a...

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Effective Nuclear Charge In a many-electron atom, each electron is simultaneously: attracted to the protons in the nucleus repelled by other electrons (like-charge repulsion) What is the average environment, created by the nucleus and all the other electrons in the atom, which is "felt" by a particular electron in the atom? The net positive charge attracting the electron is called the effective nuclear charge Any electron density between the nucleus and the electron of interest will reduce the nuclear charge acting on that electron The effective nuclear charge ( Z eff ) equals the number of protons in the nucleus ( Z ), minus the average number of electrons ( S ) that are between the electron in question and the nucleus The positive charge "felt" by the outer electrons is always less than the full nuclear charge (inner electrons "screen" the nuclear charge). Energies of orbitals The extent to which an electron will be screened by the other electrons depends on the shape of the electron distribution as we move out from the nucleus
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Effective Nuclear Charge - Effective Nuclear Charge In a...

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