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Atomic Structure

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Isotopes atoms of the same element with differing mass ... Radioactive Dating. Determines age based on ratio of radioactive isotopes to stable isotopes/atoms. ... – PowerPoint PPT presentation

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Title: Atomic Structure


1
Atomic Structure
  • Lemay, Eugene, Beall, Herbert, Robblee, Karen,
    Brower, Douglas. (1996). Atomic Structure.
    Applications of Nuclear Chemistry. In
    Chemistry Connections to Our Changing World
    (pp. 90-123, 777-803). Upper Saddle River, NJ
    Prentice Hall.

2
Modern Atomic Theory
  • Terms
  • Proton
  • Neutron
  • Electron
  • Atomic numbernumber of protons
  • Periodic tablemethod of arranging elements
  • Atomic mass unit
  • Ionsatoms with charges
  • Isotopesatoms of the same element with differing
    mass

3
Modern Atomic Theory
  • Terms
  • Nuclear reaction
  • Strong nuclear force
  • Weak nuclear force
  • Electromagnetic force
  • Gravitational force

4
Modern Atomic Theory
  • Terms
  • Radiation
  • Alpha particleHe atom (w/o e-)
  • Beta particlee-
  • Gamma rayenergy, smallest wavelength
  • Half-lifetime required for ½ of the mass of a
    substance to change into another substance

5
Modern Atomic Theory
  • Terms
  • Fissionsplitting a nucleus
  • Fusioncombining a nucleus

6
Conventions
  • 12 1 1 14
  • 6 0 0 6
  • p. 778, 782

n
?
C
n
C


7
Radioactive Dating
  • Determines age based on ratio of radioactive
    isotopes to stable isotopes/atoms.
  • Assumes
  • Rate of decay never changes
  • Closed system
  • Current theories, not based on actual
    observations (extrapolated) i.e. past conditions
    known
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