Nuclear Nuclear ChemistryChemistry

Chapter 10

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

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

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%)

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

Table 10.1