Chemistry Chapter 5

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misol
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296151
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Chemistry Chapter 5
Updated:
2015-02-18 01:15:30
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chemistry chapter sacco
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chemistry chapter 5 sacco
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  1. Lewis Dot Symbol
    • shows valence electrons 
    • must have one on each side before pairing up
  2. Lewis Dot Trends
    • 1A & 2A, dots represent number of electrons LOST
    • 3A - 7A, unpaired electrons are number of BONDS atoms can form
  3. Ionic Compound salts
    cation and anion (usually metal + nonmetal)

    held together by an electrostatic attraction (ionic bond) b/c of transfer of electrons 

    note: ionic compounds are always neutral (no charge)
  4. Structure of NaCl: ionic compounds
    3D lattice of a repeating unit (release a large about of energy, more than input)
  5. Lattice E
    the amount of E needed to convert 1 mole of ionic compound from solid to gas
  6. Trend for lattice E (from s to g)
    • Lattice E ↑
    • (high lattice E means compound is stable)

    smaller distance between ions means higher lattice E
  7. Lewis Theory of Bonding
    chemical bond is a sharing of e- and goal is to "achieve" noble gas configuration
  8. Molecule
    Atoms joined by a covalent bond in a fixed ration of 2+ elements (can be element or compound and is NEUTRAL)
  9. Diatomic Molecules
    • Homonuclear
    • Heteronuclear (HCl, KBr)
  10. Homonuclear
    H2, N2, O2, F2, Cl2, Br2, I2
  11. Polyatomic Molecules
    H2O, C3H8
  12. Molecular Formula
    Number of atoms in molecules
  13. Allotropes
    • ≥ 2 forms of the element 
    • O2  vs O3 (ozone)
    • C graphite vs C diamonds
  14. Structural Formula
    H2O = HOH or H-O-H
  15. Empiricle Formula
    • shows what elements and shows what whole number ration that they are combined 
    • H2O2 (molecular) vs HO (empirical)
  16. Polyatomic Ions
    group of ≥ 2 atoms with an overall charge
  17. Oxoacid
    Produce H+ and oxoanions
  18. Types of Oxoacid
    • monoprotic - 1 ionizable H
    • diprotic - 2 ionizable H
    • polyprotic - ≥2 ionizable H
  19. Hydrate
    an ionic compound with a specific number of H2O molecules attached

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