Mock Quiz Radioactivity
1. What are the differences for individuals versus society for the following types of
radioactive waste?
a. A sample of uranium with a billion year half life
b. A sample of polonium with a few second half life
2. Balance the following nuclear reactions:
a. Uranium-235 (alpha decay)
b.14
N (electron capture)
7
54
c. 25 Mn (beta emission)
3. The half life for Carbon-14 is 5614 years. An ancient piece of cloth is found to
contain ¼ of its original Carbon-14. How old is the cloth?
4. The half life for Uranium-238 undergoing alpha decay is 4.5 x 109 years.
a. Write the balanced nuclear equation for uranium 238 undergoing alpha
decay.
238
U
92
→
b. If we start with 60 atoms of Uranium-238 how many U-238 will remain
after 13.5 billion years?
PV=nRT
CdVd=CcVc
R = 0.0821 L atm/molK
PV=mRT
MW