CHEM 1010, Introd uctory Chemistry
Name:
Assignment 4
04/01/09
Due at the beginning of class on 04/08/09.
1. A particular form of 99Tc is used medically for diagnostic imaging procedures. Its half-life is 6.0 hours. In a
typical procedure a patient may receive 50 mg of 99Tc. Determine the amount that will remain in the patient
after 2 days?
2. Write the complete nuclear decay reactions for the following:
(a) alpha emission of
!
87
221Fr
.
(b) beta emission of
!
26
59Fe
3. Suppose that a
!
92
235U
nucleus captures a neutron and subsequently undergoes fission to produce two neutrons
and two identical nuclei. Write the complete nuclear reaction describing this process.
4. List the properties associated with each of the following:
(a) alpha particale โ
(b) beta particle โ
(c) gamma radiation โ
5. Explain why a thick pair of gloves will protect against alpha radiation by not against gamma radiation?
6. What is a breeder reactor?
7. How does uranium used in a power plant differ from weapons-grade uranium?
8. What is the relationship between uranium and radon and why is there concern about exposure to radon?
