Match the radioactive tracer with its most common use.

1. Estimating the age of formerly living ancient artifacts
2. Biological tracer used in PET scans
3. Cancer treatments
4. Most widely used biological tracer used to detect brain tumors and bone and 5. lung ailments
6. Detection and treatment of thyroid ailments
7. Fuel in nuclear reactors
8. Smoke detectors in homes and industry

A. Iodine-131
B. Uranium-235
C. Cobalt-60
D. Carbon-14
E. Technitium-99
F. Fluorine-18
G. Americium-241