For each of the following, determine the missing particle, and checkmark the type: alpha-emission, beta-emission,
positron emission, or electron capture.
Nuclear Equation Type of radiation event (Checkmark event)
a) 230Th →_____ + 226Ra __Alpha emission __Beta emission __Positron emission __ Electron capture
b) 205Pb + _____ → 205Tl __Alpha emission __Beta emission __Positron emission __ Electron capture
c) 201Hg + _____→ 201Au __Alpha emission __Beta emission __Positron emission __ Electron capture
d) 38K → ______ + 38Ar __Alpha emission __Beta emission __Positron emission __ Electron capture
e) 234Th → _____ + 234Pa __Alpha emission __Beta emission __Positron emission __ Electron capture
II. For each of the following, write the complete nuclear reaction for the indicated event in the space below.
Write the isotope symbols in all your reactions in this format ????௓
Write your complete reaction here:
a. beta-emission from 203Po
b. alpha-emission from 131Eu
c. electron capture by 203Au
d. positron emission from 17N
III. Use the following data to answer the questions below: https://www.epa.gov/radiation/radiation-sources-and-doses
1 curie (Ci) = amount of radioactive substance that undergoes 3.70x1010 disintegrations per second (dps)
1 roentgen (R) = deposition of 9.33x10-6 J/g of tissue.
1 rem = dose of radiation that has the effect of 1 roentgen
Total annual radiation exposure from all sources is 360 mrem (millirem)
a. If you were exposed to all sources of radiation from natural sources and human activities, how many years
would it take for you to absorb 500.0 rem (a fatal dose) of radiation?
b. If you smoke 2.0 packs of cigarettes a day, you will be exposed to 9000.0 mrem per year. Recalculate the
number of years in part "b", assuming you also smoke 2.0 packs of cigarettes a day (1 pack contains 20
cigarettes).