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Unit 3-4 to 3-7 review

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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Unit 3-4 to 3-7 review

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  1. Unit 3-4 to 3-7 review

  2. Effective nuclear charge • What is shielding effect? • Core e- v.s. valence e- • Which one is easier to remove? • How to calculate Zeff ? • S2⁻ ?

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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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