Usages of Radioisotopes

U-238

According to Table N, which radioactive isotope is best for determining the actual age of Earth?

release larger amounts of energy

Compared to an ordinary chemical reaction, a fission reaction will

Carbon-14 and Carbon-12

Radioactive dating of the remains of organic materials can be done by comparing the ratio of which two isotopes?

dating to determine age

Which procedure is based on the half-life of a radioisotope

N-16

Which radioactive waste can be stored for decay and then safely released into the environment? (N-16; Sr-90; Cs-137; Pu-239)

U-238

Which radioisotope is used in dating geological formations?

I-131

Which radioisotope is used in diagnoses of thyroid disorder?

Technetium-99

A radioisotope that is sometimes used in pinpointing brain tumor is

tracer

A radioisotope used to follow a chemical reaction is called a

the conversion of mass to energy

A fission reaction is similar to a fusion reaction in that both reactions involve

C-14

A product is formed during a reaction between organic molecules. This reaction may be studied by using which of the following radioisotope

determine the course of a chemical reaction

A radioisotope is called a tracer when it is used to

radioactive isotopes

Dating once-living organisms is an example of a beneficial use of

Fe-56

Diagnosing of blood disorder could be done using which radioisotope?

short half-lives and are quickly eliminated from the body

Diagnostic injections of radioisotopes used in medicine normally have

exothermic

Fission and fusion are exothermic or endothermic

U-238 and Pb-206

Geological dating can be done by comparing mineral remains of which two isotopes?

fusion

H-2 + H-2 --> He-4

has a very short half-life

Iodine-131 is used in diagnosing thyroid disoriders because it is absorbed by the thyroid gland and

radioisotope

The course of a chemical reaction can be traced by using a

Carbon-14

What nuclide is a radioisotope used in the study of organic reaction mechanism

C-14

Which isotope is most commonly used in the radioactive dating of the remains of organic materials?