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Unit 3-4 to 3-7 review. Effective nuclear charge. What is shielding effect? Core e- v.s . valence e- Which one is easier to remove? How to calculate Z eff ? S 2⁻ ?. Periodic trend. Steps to determine the size trend of atom or ions. n Z eff Outer most e# Isoelectronic ions

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Presentation Transcript
effective nuclear charge
Effective nuclear charge
  • What is shielding effect?
  • Core e- v.s. valence e-
    • Which one is easier to remove?
  • How to calculate Zeff ?
    • S2⁻ ?
periodic trend
Periodic trend
  • Steps to determine the size trend of atom or ions.
    • n
    • Zeff
    • Outer most e#
  • Isoelectronic ions
    • How to determine the size trend of isoelectronic ions.
  • Ionization energy (IE)
    • Reactions of IE1 and IE2
    • IE trend of atoms
  • Electron negativity and electron affinity (EA)
    • Reactions of EA.
    • Trend
  • Metallic trends
bond types
Bond types
  • Ionic bonds
    • Definition
  • Covalent bonds
    • Definition
  • Metallic bonds
    • The valence e- are delocalized from the metal atoms
  • Difference between ionic and molecular compounds
  • What kind of compounds contain both ionic and covalent bonds
formula
Formula
  • Empirical v.s. molecular formula
  • Ionic compound: empirical formula
  • Covalent/ molecular compound: molecular formula
  • Formulas for pure element
    • Molecular element
      • Diatomic:
      • Polyatomic: S8 and P4
    • Atomic element
naming the compound
Naming the compound
  • Polyatomic ions and oxyacid.
  • Rules of ionic compound
    • Containing group 1A, 2A, 3A metals, Ag and Zn
    • Containing the rest of metals
  • Rules of covalent/molecular compound
  • Naming hydrates: ionic compounds containing water
  • 6 common strong acid
    • HCl, HBr, HI
    • HNO3, H2SO4, HClO4
formula based calculation
Formula based calculation
  • Converting between the ions/atoms and the whole compound
    • Based on mole ratio (the subscript)
    • Based on the mass%
  • Finding the empirical formula based on the mass% or mass of the ions/elements of the compounds.
  • Finding the molecular formula based on empirical formula and MM.
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