PHYSIO ch 2

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BachataLuv
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194906
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PHYSIO ch 2
Updated:
2013-01-24 01:03:54
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BIO 220
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  1. ATOM
    Unit of matter. 

    Made of protons (+ charged)

    Neutrons (NO charge)

    Electrons (-Charged) 
  2. Whats found in Central part of Nucleus
    • Protons
    • Neutrons
  3. Where are electrons found?
    Outer part of atom 

    Electron shell
  4. Isotope
    Same # of protons but different # of neutrons. 

    • Ex.
    •  Hydrogen (1P: 0Neutrons)
    • Deuterium (1P: 1 Neutron) 
    • Tritium (1P: 2 Neutrons)
  5. Ion
    Charged atom or molecule
  6. Change # of electrons
    Create + or - charged ions
  7. Change # of Neutrons
    Create new Isotope
  8. Change # of Protons
    Create new element
  9. Ionic Bond
    Transfer of electrond between elements 

    Ex

    NaCL formation
  10. Covalent Bond
    Sharing of electrons between elements;

    Stronger than Ionic

    EX: 1H2, and O2 
  11. Two types of covalent Bonds
    Polar 

    Nonpolar
  12. Nonpolar Bonds
    Atoms share electrons equally or symmetrically. 
  13. Polar Covalent Bonds
    • Atoms share e-unequally 
    • Ex H2O  Oxygen attracts electrons better than Hydrogen.

    Polar molecules have opposite charges on opposite ends.
  14. Electronegativity
    The power to attract electrons; 

    Oxygen is a very electronegative atom.
  15. Hydrogen Bonds
    Occurs between polar molecules (like water)

    Indicated by DOTTED lines instead od solid

    WEAKEST of 3 types of bonding 
  16. Carbon Based Life
    Made up mostly of water & Carbon molecules

    Carbon capable of forming 4 covalent bonds.

    Can bond w many elements/ Itself.

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