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Nuclear Nuclear ChemistryChemistry
Chapter 10
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Homework AssignmentHomework AssignmentChap 10Chap 10
Sections 1 - 3 onlySections 1 - 3 only
Review Questions (p 211): 1 – 6Review Questions (p 211): 1 – 6
Multiple Choice Questions: 1 - 3Multiple Choice Questions: 1 - 3
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ParticleParticle CompositionComposition ChargeCharge PenetrationPenetration
AlphaAlpha
αα2 protons and 2 protons and
2 neutrons2 neutrons2+2+ stopped by stopped by
paperpaper
BetaBeta
ββan electronan electron 1-1- stopped by stopped by
aluminumaluminum
GammaGamma
γγpure energypure energy 00 stopped by stopped by
leadlead
Radioactive particlesRadioactive particles
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Fig 10.1 Origins of Radiation Exposure in the USFig 10.1 Origins of Radiation Exposure in the US
Natural background (81%):
Biggest source: Radon-222
Medicine (15%) Consumer products (4%)
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Biological Effects of Radiation
• Radiation absorbed dose (rad)
• 1 rad = 1 x 10-5 J/g of material
• Roentgen equivalent for man (rem)
• 1 rem = 1 rad x Q
Quality Factor
= 10 = 1
Units of Radiation
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Table 10.1