Nuclear Chemistry
FissionFission: Division of a heavy nucleus into two or more smaller nuclei.
(Used in weapons and power plants)
FusionFusion: Combining two light nuclei. Releases more energy than fission.(Used in weapons. Still working on power plants)
Alpha • Helium Nucleus• Positive charge• Easily stopped• Mass # of atom:-4 Atomic # of atom: - 2
Beta• Electron (- charge)
• Mass # of atom same, atomic # of atom + 1
0-1 e
Gamma• High energy electromag. Wave• Mass # of atom same Atomic # of atom same
00 Y
Balancing Nuclear Equations
The Mass #s and Atomic #s have to be equal on both sides of the equation.
23490 Th238
92 U
Beta Equations
13154 Xe
0-1e
12751Xe + + 00 Y
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
Warm Up 9/19
What discovery did the gold foil experiment lead to?
Rutherford’s Gold Foil Experiment• Fired particles at gold foil• Some particles bounced back• Why? Because of the dense central nucleus
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.
Particle &
SymbolCharge What it
isBlocked
by
Alpha
Beta
Gamma
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