nuclear chemistry fission fission: division of a heavy nucleus into two or more smaller nuclei....
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Nuclear Chemistry
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FissionFission: Division of a heavy nucleus into two or more smaller nuclei.
(Used in weapons and power plants)
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FusionFusion: Combining two light nuclei. Releases more energy than fission.(Used in weapons. Still working on power plants)
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Alpha • Helium Nucleus• Positive charge• Easily stopped• Mass # of atom:-4 Atomic # of atom: - 2
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Beta• Electron (- charge)
• Mass # of atom same, atomic # of atom + 1
0-1 e
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Gamma• High energy electromag. Wave• Mass # of atom same Atomic # of atom same
00 Y
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Balancing Nuclear Equations
The Mass #s and Atomic #s have to be equal on both sides of the equation.
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23490 Th238
92 U
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Beta Equations
13154 Xe
0-1e
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12751Xe + + 00 Y
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Nuclear Radiation – particles and electromagnetic waves that are flung at high speeds from nucleus.
Q: Why does it happen?A: Unstable nuclei!Q: Why unstable?A: # of neutrons
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Warm Up 9/19
What discovery did the gold foil experiment lead to?
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Rutherford’s Gold Foil Experiment• Fired particles at gold foil• Some particles bounced back• Why? Because of the dense central nucleus
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Superhero!Your job is to create a superhero that can block that type of radiation.
Include all of the information in your folder on your poster.
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Particle &
SymbolCharge What it
isBlocked
by
Alpha
Beta
Gamma