Unit 3 4 to 3 7 review
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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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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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