1. Rank alpha, beta, and gamma radiation in order
of increasing penetrating ability.
2. What type of shielding material is necessary
to protect you from:
a. a-radiation _______________________
b.
b-radiation ________________________
c.
g-radiation ________________________
3. If you are 5 meters from a radiation source,
the intensity of the radiation
you are exposed to is _______ times that of a person 20
meters from the
same radiation source.
4. Complete the following nuclear equations.
a. 28Al ® _____
+ b
b. ______
® 234Th +
a
c. 210Bi ® _______
+ a
d. 35S ® _______
+ b
5. Strontium - 85, used for bone scans, has a
half-life of 64 days. A 120 g sample of
strontium - 85 is stored for 192 days.
How many grams of the strontium - 85 remains?
6. Iodine - 131, used to diagnose and treat
thyroid conditions, has a half-life of 8 days.How many days does it take for
the amount of iodine
- 131 in the sample to decrease from 80 g to 5 g?