chemistry 1010 radioactive decay. nuclear chemistry notation
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Chemistry 1010
Radioactive Decay
Nuclear Chemistry Notation
xAZ Cl35
17
mass #
atomic #
Type of Radiation
Alpha
Beta
Gamma
Symbol
Charge
+2
-1
0
Particle
He Nucleus
Electron
Radiation
Mass (amu)
4
1/1837
0
Penetration
Paper
Wood
1” lead
Alpha decay
loss of He nucleus
Beta decay
loss of an Electron from the nucleus
Gamma decay
no mass or charge change – but usually
accompanies an alpha or beta decay.
Isotope Dating
• There are naturally occurring elements that are radioactive
• The decompose on their own
• The rate of decomposition does not change
½ life – Time it takes for half of a substance to decay into another
Isotope Dating
Isotope Dating
0min 10min 20min 30min
1/21/4
1/8
1/2 life = 10 minutes
Nuclear Power in the US
• There are 109 nuclear power plants
• 22% of our power is nuclear
Type of Uranium
• 3-4% U 238, for reactors, 90% for bomb
• Not possible to get an explosion
Benefits of Nuclear Power
• Very Economical (Cheap)
• Environmentally Clean (no emissions)
Problems With Nuclear Power
• Production of Nuclear Waste
• Possible Melt Down and Leakage
TherapeuticTreat or cure a disease with
Radiation
Images from Yahoo Images
