Chem Chap 10

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babyg7207
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246051
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Chem Chap 10
Updated:
2013-11-09 20:36:29
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Chem chap 10
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  1. Bond
    • it is the force of attraction between atoms (ions) of a particle.
  2. Lewis Theory
    Elements lose, gain or share valence electrons to become stable like noble gases
  3. Ionic Bonds
    is formed by the transfer of valence electrons from metal to the non metal

    is the force of attraction between oppositely charged ions.

    • Ionic compounds 
    • Metal + Non metal
  4. Covalent bond
    is formed by the sharing of valence electrons between non metallic atoms
  5. Valence electrons
    are represented as dots around the symbol of an element
  6. Always remember for Ionic Compound
    • transfer dots to non metals (8)
    • metal (charge) non metal in [] (charge outside)
    • Formulas ex] CaCl2
  7. Bond pair
    • is a pair of electrons shared (involved with bond making) 
    •  
    • can be single, double or triple
  8. Lone pair
    is a pair of electrons not shared (not involved in bond making)
  9. Non polar bond
    is a bond formed by equal sharing between similar atoms
  10. Polar bonds
    is a bond formed by unequal sharing of electrons between different kinds of atoms
  11. Electronegitivity of an element
    is the measure of ability of an element to pull the shared pair of electrons toward itself

    (smaller size easily attract electrons)
  12. Pauli's scale of E.N
    • H-2.1
    • C-2.5
    • N-3.0
    • O-3.5
    • F-4.0

    Fr-0.8

    • Ex] O>N
    • N−O  
    • ⊕→
  13. Difference in E.N.-----Type
    0-0.5 ======= Non polar

    0.5-2.0 ====== Polar

    2.0 and above ===== Ionic
  14. Lewis structure of Polyatomic ions
    Charge particle consisting of groups of atoms bonded (covalent) together.
  15. VSEPR Theory
    Valence shell Electron Pair Repulsion Theory
    Electrons pairs surrounding the central atoms try to spend as far apart as possible to minimize repulsion and there by attain stability
  16. Polarity of Molecules
    • Polarity of bonds
    • Shape of molecules 
    • Net dipole moment

    Ex] Net dipole for CO2 molecule is zero as it has linear shape and is NON Polar
  17. Net dipole
    has a value as bond dipole doesnt (cancel out)

    H2O is Polar, bent shape, net dipole has value ≠0

    CO2 is Non polar, linear shape, net dipole is zero

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