Chem 1B COD

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Author:
Mattyj1388
ID:
169853
Filename:
Chem 1B COD
Updated:
2012-09-09 16:46:01
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COD Chem 1B
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  1. Magic #
    • atoms with certain number of nuerons have unique stability.
    • # of stable Nuclides
    •    Z          N         # of Nuclides
    • even      even              157
    • even      even                53
    • odd       even                 50
    • odd        odd                    5
    • Other magic numbers: Z = 2, 8, 20, 28, 50, 82, 126
  2. Proton symbol
    11P
  3. Neutron symbol
    10N
  4. Electron symbol
    0-1e
  5. Position emission
    • Position emission: emitts position 01e
    • Position: an e- that changed charge from negitive to positive like a proton but still is an electron.
    • 3015P --> 3014Si + 01e
  6. Electron capture
    • Electron Capture: when neucleus captures an e- from the inner orbital and charges it to a neutron 10N.
    • 9244Ru + 0-1e --> 9243Tc
  7. Ionization power
    • ability to ionize molecules and atoms.
    • Ionization strength between alpha, beta, and gamma ray
    • alpha decay > beta decay > gamma decay
  8. Penetrating power
    • ability to penitrate matter.
    • gamma ray > beta decay > alpha decay
  9. Gamma emission
    • Gamma ray emission: 42He & gamma are released.
    • 23892U --> 23490Th +00(gamma) + 42He
  10. Radio Carbon dating
    • used to estimate the age of acncient fossils.
    • t1/2 "half life" = 5730 years
  11. Atomic fission
    • the splitting of a Uranium nucleus:
    • 23892U + 10N --> 14056Ba + 9336Kr +310N + energy
  12. Critical mass
    enough U-235 to create a sustained chain reaction to occur.
  13. Nuclear Power Plants
    • Control rods: absorb excess neutrons
    • mass defect & nuclear binding energy.
    • E=mc2 --> nuclear binding energy.
  14. Types of radioactivity
    • AZX
    • A = Mass #
    • Z = atomic # aka # of protons (p+)
    • X = chem symbol
    • N = A - Z
    • N = # of nuetrons
  15. C14 / C12
    • ln [ (C14/C12) / (C14/C12)t] = (1.2 x 104)t
    • note: [C14/C12]0 = (1.2x10-12)=A0 = C14
  16. Salt Bridge
    • A tube that contains an electrolyte that connects the two half-cells of a galvanic cell.
    • f(x): allows the movement of ions required to keep the solution electrically neutral. (essential to complete the circuit).
  17. Galvnic
    Spontaneous redox reaction in which the electron transfer is forced to take place through a wire. SPONTANEOUS
  18. Pu - 242
    24294Pu --> 42He + 23892U

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