Screening percentages based on Slater effective nuclear charge as a versatile tool for teaching periodic trends

Journal of Chemical Education

Volumn 78, Issue 5, 2001, Pages 635-639

  Waldron, Kimberley A ^a   Fehringer, Erin M ^a   Streeb, Amy E ^a   Trosky, Jennifer E ^a   Pearson, Joshua J ^a  

^a REGIS UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0035338247     PISSN: 00219584     EISSN: None     Source Type: Journal    
DOI: 10.1021/ed078p635     Document Type: Article

References (9)

1. Coulson, C. A. Valence, 2nd ed.; Oxford University Press: London, 1961; p 29.
2. Slater, J. C. Quantum Theory of Atomic Structure, Vol. 1; McGraw Hill: York, PA, 1960; p 112.
3. Adapted from Porterfield, W. W. Inorganic Chemistry: A Unified Approach; Academic: New York, 1993; p 23. The shielding constant, S, is determined by dividing the electrons into the following groups, each having a different shielding constant: 1s; 2s, 2p; 3s, 3p; 3d. That is, the s and p of a given n are grouped together, but the d and f are separated. The shielding constant, S is formed for any group of electrons from the following contributions: (rule 1) electrons from any shell outside the one considered contribute 0.0 to the screening; (rule 2) an amount 0.35 is counted for each other electron in the group considered except in the 1s group, where 0.30 is used instead; (rule 3) if the electron considered is a d or f electron, each electron in an inner group contributes 1.00 to the screening (it screens completely); (rule 4) if the electron considered is an s or p electron, an amount 0.85 is counted for each electron with quantum number of n - 1 and 1.00 from each electron still further in.
4. Fock, V. Z. Physik 1930, 61, 126.
5. Slater, J. C. Phys. Rev. 1930, 36, 37.
6. Screening percentages are empirically derived from experimental ionization energy data from the following sources: Martin, W. C.; Hogan, L.; Reader, J.; Sugar, J. J. Phys. Chem. Ref. Data 1974, 3. Moore, C. E. Atomic Energy Levels; NBS Circular 467; National Bureau of Standards: Washington, DC, 1970.
7. Screening percentages are empirically derived from experimental ionization energy data from the following sources: Martin, W. C.; Hogan, L.; Reader, J.; Sugar, J. J. Phys. Chem. Ref. Data 1974, 3. Moore, C. E. Atomic Energy Levels; NBS Circular 467; National Bureau of Standards: Washington, DC, 1970.
8. Allred, A. L.; Rochow, E.G. J. Inorg. Nucl. Chem. 1961, 17, 215.
9. Sanderson, R. T. Inorganic Chemistry; Reinhold: New York, 1967; p 74.