Slater's Rules (Zeff)Chemistry

Slater's Rules Effective Nuclear Charge (Zeff) & Shielding Calculator

Calculate effective nuclear charge (Zeff) and electron shielding constant (S) for valence electrons using Slater's empirical quantum screening rules.

Calculated Result

Effective Nuclear Charge (Zeff)

6.1e

Calculator Inputs

protons
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e⁻
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e⁻
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e⁻
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Effective Nuclear Charge (Zeff)

6.1e

Total Shielding Constant (S)

10.9 -

Nuclear Charge Shielding (%)

64.12 %

Slater Rules Verified: Valence electron experiences net electrostatic attraction equal to Zeff following core screening reduction.

True Nuclear Charge Z vs Effective Nuclear Charge Zeff

Atomic Number Z
17 -(74%)
Effective Zeff
6.1 -(26%)

Standard inorganic chemistry and periodic table periodicity tool for atomic radii and ionization energy trends.

Calculation Methodology

Effective Nuclear Charge: Zeff = Z - S. Where Z is atomic number, and S is the screening constant calculated via Slater's rules: same (ns, np) shell electrons shield by 0.35 each, (n-1) shell electrons shield by 0.85 each, and (n-2) or deeper core electrons shield completely by 1.00 each.

Frequently Asked Questions

The net positive electrostatic attraction experienced by an electron from the nucleus, reduced by the repulsive screening of intervening core and valence electrons.

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