Ch.8 - Periodic Properties of the ElementsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution:
Detailed calculations show that the value of Zeff  for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+ , respectively.What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl, assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant?

Solution: Detailed calculations show that the value of Zeff  for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+ , respectively.What value do you estimate for Zeff experienced by the outermost ele

Problem

Detailed calculations show that the value of Zeff  for the outermost electrons in Si and Cl atoms is 4.29+ and 6.12+ , respectively.

What value do you estimate for Zeff experienced by the outermost electron in both Si and Cl, assuming that core electrons contribute 1.00 and valence electrons contribute 0.00 to the screening constant?

Solution
  • Effective nuclear charge (Zeff) can be calculated by getting the difference of actual nuclear charge (Z) and screening effect (δ) caused by electrons between nucleus and valence electrons. 

Z* = Z - δ

  • The actual nuclear charge is also the atomic number of the element (no. of protons)

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