Exam 8: Nuclear Chemistry

A sample of a radioacitive isotope has an activity of 80 μCi when produced. 60 min later when it is being used the activity has dropped to 10 μCi. What is the half-life of this isotope?

The half-life of is bromine-80 is 17.6 min. Approximately how long will it take for the activity of this isotope to drop from to 320 mCi to 10 mCi?

The image below is a representation of the formation of radical (X)by different types of radiation (1,2,and 3). Based on this diagram answer the following questions. -This type of radiation can produce "secondary" X-ray photons. _____

The following image could illustrate the process of nuclear fusion.

The following decay occurs through the emission of

The activity of 1.0 μg of fluorine-18 is 89 Ci. Which of the following is not equivalent to this activity?

The following correctly applies to balancing nuclear equations. "The sums of the mass numbers of the products and reactants must be equal."

Background radiation is ionizing radiation emitted from natural sources and essentially cannot be avoided.

The image below is a representation of the formation of radical (X)by different types of radiation (1,2,and 3). Based on this diagram answer the following questions. -This type of radiation is useful for diagnostic imaging: _____

Which of the following is true of nuclear fission but not nuclear fusion?

The following image depicts beta decay.

¹³¹I has a half life of 8 days. Approximately how long will it take a sample with an activity of 60 mCi to drop to about 3.75 mCi?

Write the nuclear symbol for sulfur-32.

Consider the process illustrated in the image below. Which of the following is true of this process?

An exposure to equal amounts of energy from nuclear radiation occurred at two different sites. At the first site an employee was exposed to neutrons with a W_R of 16 and received a dose of 33 mrem. At the second site a worker was exposed to alpha particles. What dose did this second empolyee receive?

When uranium-235 fissions the energy is emitted

Iodine-131 is used in the treatment of thyroid disorders. 1.0 μg of this isotope produces 3.5 mCi. If a patient is given a dose of 165 mCi, what mass of iodine-131 was in the sample?

The fusion of deuterium ( ) and tritium ( ) holds some promise as a source of nuclear energy. If a neutron is produced, the other product of the reaction is .

Write the nuclear equation for the beta decay of iodine-131.

Consider the graph of activity versus time for a naturally occurring isotope. The half-life of this isotope is between 80 and 120 hours.